# Quizbank/College Physics Sem 1/T2

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College Physics Sem 1/T2 ID153514416667

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Exams:

Answers:

78 Tests = 3 versions x 26 variations: Each of the 26 variations (A, B, ...) represents a different random selection of questions taken from the study guide.The 3 versions (0,1,..) all have the same questions but in different order and with different numerical inputs. Unless all students take version "0" it is best to reserve it for the instructor because the questions are grouped according to the order in which they appear on the study guide.

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### T2 A0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is accelerating for such a brief time that there is little motion

2) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southwest
c) southeast
d) south
e) west

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northeast
c) northwest
d) south
e) southeast

4) A car is traveling west and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

5) A car is traveling east and slowing down. The acceleration is

a) to the east
b) zero
c) to the west

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) east
b) south
c) west
d) north
e) zero

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) zero
b) west
c) south
d) north
e) east

8) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

a) 61.1 N.
b) 70.3 N.
c) 80.8 N.
d) 92.9 N.
e) 106.9 N.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
a) 13.3 N.
b) 15.3 N.
c) 17.59 N.
d) 20.23 N.
e) 23.27 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
a) 34.8 N.
b) 41.8 N.
c) 50.2 N.
d) 60.2 N.
e) 72.3 N.
13)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 3.9 kg. If the external force, Fext on m2 is 136 N, what is the tension in the connecting string? Assume no friction is present.
a) 79 N
b) 90.8 N
c) 104.4 N
d) 120.1 N
e) 138.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.

15) What is the gravitational acceleration on a plant that is 2.98 times more dense than Earth, and a radius that is 1.81 times greater than Earth's?

a) 30.2 m/s2
b) 34.8 m/s2
c) 40 m/s2
d) 46 m/s2
e) 52.9 m/s2

#### T2 A1

1)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
a) 10.01 N.
b) 11.51 N.
c) 13.23 N.
d) 15.22 N.
e) 17.5 N.

2) What is the gravitational acceleration on a plant that is 1.23 times more dense than Earth, and a radius that is 1.83 times greater than Earth's?

a) 19.2 m/s2
b) 22.1 m/s2
c) 25.4 m/s2
d) 29.2 m/s2
e) 33.5 m/s2

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northeast
c) northwest
d) north
e) southeast

4) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) east
b) north
c) south
d) west
e) zero

5) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southeast
c) southwest
d) south
e) west

6) A mass with weight (mg) equal to 37 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 65 degrees with respect to the horizontal. What is the tension in each string?

a) 15.4 N.
b) 17.7 N.
c) 20.4 N.
d) 23.5 N.
e) 27 N.

7) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 2.6 s
b) 2.99 s
c) 3.43 s
d) 3.95 s
e) 4.54 s

8) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly

9) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the east
c) to the west

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

a) 17.21 N.
b) 19.79 N.
c) 22.76 N.
d) 26.17 N.
e) 30.1 N.
11)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
a) 32.5 N.
b) 39 N.
c) 46.8 N.
d) 56.2 N.
e) 67.4 N.
12)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 3.9 kg. If the external force, Fext on m2 is 136 N, what is the tension in the connecting string? Assume no friction is present.
a) 79 N
b) 90.8 N
c) 104.4 N
d) 120.1 N
e) 138.1 N

13) A car is traveling west and slowing down. The acceleration is

a) to the west
b) to the east
c) zero

14) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) west
b) south
c) east
d) north
e) zero

15) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.44 minutes.
b) 6.25 minutes.
c) 7.19 minutes.
d) 8.27 minutes.
e) 9.51 minutes.

#### T2 A2

1) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) west
b) northwest
c) southwest
d) south
e) southeast

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.198 rad/sec. How many minutes does it take to complete 10.5 revolutions?

a) 4.83 minutes.
b) 5.55 minutes.
c) 6.39 minutes.
d) 7.34 minutes.
e) 8.45 minutes.
3)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T1?
a) 79.1 N.
b) 95 N.
c) 114 N.
d) 136.8 N.
e) 164.1 N.

4) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

a) 20.5 m/s2
b) 23.5 m/s2
c) 27.1 m/s2
d) 31.1 m/s2
e) 35.8 m/s2
5)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
a) 26.66 N.
b) 30.66 N.
c) 35.25 N.
d) 40.54 N.
e) 46.62 N.

6) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 2.6 s
b) 2.99 s
c) 3.43 s
d) 3.95 s
e) 4.54 s

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) zero
b) west
c) south
d) north
e) east

8) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

a) 27.4 N.
b) 31.5 N.
c) 36.2 N.
d) 41.7 N.
e) 47.9 N.

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly

10) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) zero
b) south
c) north
d) west
e) east

11) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

a) 24.29 N.
b) 27.93 N.
c) 32.12 N.
d) 36.94 N.
e) 42.48 N.
12)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 3.9 kg. If the external force, Fext on m2 is 136 N, what is the tension in the connecting string? Assume no friction is present.
a) 79 N
b) 90.8 N
c) 104.4 N
d) 120.1 N
e) 138.1 N

13) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) north
c) northeast
d) northwest
e) southeast

14) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

15) A car is traveling west and slowing down. The acceleration is

a) to the east
b) zero
c) to the west

### T2 B0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is more slippery when it is pulled quickly
c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

3) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

4) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) zero
c) down

5) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) northeast
c) north
d) south
e) southwest

6) A car is traveling east and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

7) If you toss a coin into the air, the acceleration on the way down is

a) up
b) down
c) zero

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

a) 12.8 N.
b) 14.8 N.
c) 17 N.
d) 19.5 N.
e) 22.5 N.

9) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

a) 1.05 s
b) 1.21 s
c) 1.39 s
d) 1.6 s
e) 1.84 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 48.4 degrees
b) 55.7 degrees
c) 64 degrees
d) 73.6 degrees
e) 84.7 degrees

11) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

a) 18.6 N.
b) 21.4 N.
c) 24.6 N.
d) 28.3 N.
e) 32.6 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
a) 39.08 N.
b) 44.94 N.
c) 51.69 N.
d) 59.44 N.
e) 68.35 N.

13) Nine barefoot baseball players, with a total mass of 664 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.53 . The net mass of the (shoed) basketball team is 418 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.334
b) 0.367
c) 0.404
d) 0.444
e) 0.488

14) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

a) 7.7 newtons.
b) 8.8 newtons.
c) 10.2 newtons.
d) 11.7 newtons.
e) 13.4 newtons.

15) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.026
d) 0.03
e) 0.034

#### T2 B1

1) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

2) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

a) 9.4 newtons.
b) 10.8 newtons.
c) 12.4 newtons.
d) 14.3 newtons.
e) 16.4 newtons.

3) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

a) 53.7 degrees
b) 61.8 degrees
c) 71 degrees
d) 81.7 degrees
e) 93.9 degrees

4) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.447
b) 0.492
c) 0.541
d) 0.595
e) 0.655

5) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

a) 1.87 s
b) 2.15 s
c) 2.47 s
d) 2.85 s
e) 3.27 s

6) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

a) 12.8 N.
b) 14.8 N.
c) 17 N.
d) 19.5 N.
e) 22.5 N.

7) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) south
c) north
d) southwest
e) northwest

8) If you toss a coin into the air, the velocity on the way down is

a) down
b) up
c) zero
9)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
a) 20.1 N.
b) 23.1 N.
c) 26.6 N.
d) 30.6 N.
e) 35.2 N.

10) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

a) 0.017
b) 0.02
c) 0.023
d) 0.026
e) 0.03

11) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) down
c) zero

12) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the east
c) to the west

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) the cloth is accelerating for such a brief time that there is little motion
c) objects don't begin to accelerate until after the force has been applied

14) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) down
c) zero
15)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
a) 55.74 N.
b) 64.1 N.
c) 73.72 N.
d) 84.77 N.
e) 97.49 N.

#### T2 B2

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is accelerating for such a brief time that there is little motion
2)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
a) 20.1 N.
b) 23.1 N.
c) 26.6 N.
d) 30.6 N.
e) 35.2 N.

3) A mass with weight (mg) of 27 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

a) 12.5 N.
b) 14.3 N.
c) 16.5 N.
d) 19 N.
e) 21.8 N.

4) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

5) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

6) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

a) 36.3 degrees
b) 41.7 degrees
c) 47.9 degrees
d) 55.1 degrees
e) 63.4 degrees

7) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.422
b) 0.465
c) 0.511
d) 0.562
e) 0.619

8) A car is traveling east and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 1.27 s
b) 1.46 s
c) 1.68 s
d) 1.93 s
e) 2.22 s
10)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
a) 55.74 N.
b) 64.1 N.
c) 73.72 N.
d) 84.77 N.
e) 97.49 N.

11) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) up
c) zero

12) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

a) 9.4 newtons.
b) 10.8 newtons.
c) 12.4 newtons.
d) 14.3 newtons.
e) 16.4 newtons.

13) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) south
c) southwest
d) north
e) northwest

14) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) zero
c) down

15) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

a) 0.021
b) 0.024
c) 0.028
d) 0.032
e) 0.036

### T2 C0

1) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) up
c) down

2) If you toss a coin into the air, the velocity on the way down is

a) up
b) down
c) zero

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northwest
c) south
d) northeast
e) southwest

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) southeast
b) northwest
c) northeast
d) northeast
e) north

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) north
c) south
d) northwest
e) southeast

6) A car is traveling west and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

7) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

8) A mass with weight (mg) equal to 41 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 30 degrees with respect to the horizontal. What is the tension in each string?

a) 23.4 N.
b) 27 N.
c) 31 N.
d) 35.7 N.
e) 41 N.

9) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

a) 1.05 s
b) 1.21 s
c) 1.39 s
d) 1.6 s
e) 1.84 s

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
a) 13.3 N.
b) 15.3 N.
c) 17.59 N.
d) 20.23 N.
e) 23.27 N.
12)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
a) 32.5 N.
b) 39 N.
c) 46.8 N.
d) 56.2 N.
e) 67.4 N.
13)
In the figure shown (with m1 = 5.4 kg, m2 = 2.3 kg, and Fext = 138 N), what is the acceleration? Assume no friction is present.
a) 10.2 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 17.9 m/s2

14) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

a) 4.1 m/s2
b) 4.7 m/s2
c) 5.4 m/s2
d) 6.2 m/s2
e) 7.2 m/s2

15) What is the gravitational acceleration on a plant that is 2.01 times more dense than Earth, and a radius that is 1.54 times greater than Earth's?

a) 26.4 m/s2
b) 30.3 m/s2
c) 34.9 m/s2
d) 40.1 m/s2
e) 46.1 m/s2

#### T2 C1

1)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
a) 32.5 N.
b) 39 N.
c) 46.8 N.
d) 56.2 N.
e) 67.4 N.

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northwest
c) southwest
d) north
e) northeast

3) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) up
c) zero

4) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s

5) A car is traveling west and slowing down. The acceleration is

a) to the west
b) zero
c) to the east
6)
In the figure shown (with m1 = 5.4 kg, m2 = 2.3 kg, and Fext = 138 N), what is the acceleration? Assume no friction is present.
a) 10.2 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 17.9 m/s2

7) If you toss a coin into the air, the velocity on the way down is

a) zero
b) down
c) up

8) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

a) 36.3 degrees
b) 41.7 degrees
c) 47.9 degrees
d) 55.1 degrees
e) 63.4 degrees
9)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
a) 26.66 N.
b) 30.66 N.
c) 35.25 N.
d) 40.54 N.
e) 46.62 N.

10) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southeast
c) north
d) northeast
e) northwest

11) If you toss a coin into the air, the acceleration on the way down is

a) down
b) up
c) zero

12) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) southeast
c) north
d) northwest
e) northeast

13) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

a) 4.7 m/s2
b) 5.4 m/s2
c) 6.2 m/s2
d) 7.2 m/s2
e) 8.3 m/s2

14) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

a) 61.1 N.
b) 70.3 N.
c) 80.8 N.
d) 92.9 N.
e) 106.9 N.

15) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

a) 20.5 m/s2
b) 23.5 m/s2
c) 27.1 m/s2
d) 31.1 m/s2
e) 35.8 m/s2

#### T2 C2

1) A mass with weight (mg) equal to 21 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 66 degrees with respect to the horizontal. What is the tension in each string?

a) 6.6 N.
b) 7.6 N.
c) 8.7 N.
d) 10 N.
e) 11.5 N.
2)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
a) 46.5 N.
b) 55.8 N.
c) 67 N.
d) 80.4 N.
e) 96.5 N.

3) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) zero
c) down

4) If you toss a coin into the air, the acceleration on the way down is

a) up
b) zero
c) down

5) If you toss a coin into the air, the velocity on the way down is

a) zero
b) down
c) up

6) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) north
c) south
d) northeast
e) southeast

7) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) south
c) north
d) northwest
e) southwest

8) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s

9) What is the gravitational acceleration on a plant that is 1.23 times more dense than Earth, and a radius that is 1.83 times greater than Earth's?

a) 19.2 m/s2
b) 22.1 m/s2
c) 25.4 m/s2
d) 29.2 m/s2
e) 33.5 m/s2

10) A car is traveling west and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

11) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

a) 10.3 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 18 m/s2

12) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees
13)
In the figure shown (with m1 = 6.4 kg, m2 = 3.7 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
a) 13.4 m/s2
b) 15.4 m/s2
c) 17.7 m/s2
d) 20.3 m/s2
e) 23.4 m/s2
14)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the tension, T1?
a) 36.22 N.
b) 41.66 N.
c) 47.91 N.
d) 55.09 N.
e) 63.36 N.

15) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) north
b) northeast
c) northwest
d) northeast
e) southeast

### T2 D0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) northeast
c) southwest
d) south
e) north

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) southeast
b) north
c) northwest
d) northeast
e) northeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) north
b) south
c) southwest
d) northwest
e) northeast

5) A car is traveling east and speeding up. The acceleration is

a) to the west
b) zero
c) to the east

6) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

7) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

8) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.52
b) 0.63
c) 0.76
d) 0.91
e) 1.09

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 1.27 s
b) 1.46 s
c) 1.68 s
d) 1.93 s
e) 2.22 s

10) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

a) 36.3 degrees
b) 41.7 degrees
c) 47.9 degrees
d) 55.1 degrees
e) 63.4 degrees

11) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

a) 23.7 N.
b) 27.3 N.
c) 31.4 N.
d) 36.1 N.
e) 41.5 N.
12)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T1?
a) 30.9 N.
b) 37.1 N.
c) 44.5 N.
d) 53.5 N.
e) 64.1 N.

13) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.3 . But the team wins a game of tug of war due to their superior mass of 662 kg. They are playing against a 5 person basketball team with a net mass of 430 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.42
b) 0.462
c) 0.508
d) 0.559
e) 0.615

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.41 minutes.
b) 6.22 minutes.
c) 7.15 minutes.
d) 8.22 minutes.
e) 9.46 minutes.

15) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.025
d) 0.029
e) 0.033

#### T2 D1

1) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down

2) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

a) 1.4 s
b) 1.61 s
c) 1.86 s
d) 2.13 s
e) 2.45 s

3) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

a) 18.6 N.
b) 21.4 N.
c) 24.6 N.
d) 28.3 N.
e) 32.6 N.

4) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.5 m/s2?

a) 70.3 degrees
b) 80.9 degrees
c) 93 degrees
d) 106.9 degrees
e) 123 degrees

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northeast
c) north
d) northwest
e) southwest

6) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

a) 0.03
b) 0.034
c) 0.039
d) 0.045
e) 0.052

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.188 rad/sec. How many minutes does it take to complete 6.5 revolutions?

a) 2.74 minutes.
b) 3.15 minutes.
c) 3.62 minutes.
d) 4.16 minutes.
e) 4.79 minutes.

8) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.35 . But the team wins a game of tug of war due to their superior mass of 614 kg. They are playing against a 5 person basketball team with a net mass of 405 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.439
b) 0.482
c) 0.531
d) 0.584
e) 0.642

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is accelerating for such a brief time that there is little motion
c) the cloth is more slippery when it is pulled quickly
10)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
a) 46.5 N.
b) 55.8 N.
c) 67 N.
d) 80.4 N.
e) 96.5 N.

11) A car is traveling east and speeding up. The acceleration is

a) to the west
b) to the east
c) zero

12) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

13) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) northeast
c) southeast
d) northeast
e) north

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) northeast
c) southwest
d) north
e) northwest

15) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.7
b) 0.84
c) 1.01
d) 1.21
e) 1.45

#### T2 D2

1) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.1
b) 0.12
c) 0.14
d) 0.17
e) 0.2

2) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero
3)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.

4) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down
5)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
a) 20.1 N.
b) 23.1 N.
c) 26.6 N.
d) 30.6 N.
e) 35.2 N.

6) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.23 . But the team wins a game of tug of war due to their superior mass of 675 kg. They are playing against a 5 person basketball team with a net mass of 394 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.394
b) 0.433
c) 0.477
d) 0.524
e) 0.577

7) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

a) 1.4 s
b) 1.61 s
c) 1.86 s
d) 2.13 s
e) 2.45 s

8) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

10) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) southwest
b) northwest
c) north
d) northeast
e) south

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) southwest
c) northwest
d) south
e) north

12) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

a) 0.03
b) 0.034
c) 0.039
d) 0.045
e) 0.052

13) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

a) 3.05 minutes.
b) 3.51 minutes.
c) 4.03 minutes.
d) 4.64 minutes.
e) 5.33 minutes.

14) A car is traveling east and speeding up. The acceleration is

a) to the east
b) to the west
c) zero

15) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) north
b) northwest
c) northeast
d) northeast
e) southeast

### T2 E0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the velocity on the way up is

a) down
b) up
c) zero

3) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

4) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) zero
c) down

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) south
c) northeast
d) southwest
e) northwest

6) If you toss a coin into the air, the acceleration on the way up is

a) down
b) zero
c) up

7) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) opposite the direction of the Moon's velocity
c) away from Earth
d) in the same direction as the Moon's velocity
e) zero

8) A 2.5 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 11 N. What is the magnitude (absolute value) of the acceleration?

a) 7.3 m/s2.
b) 8.4 m/s2.
c) 9.7 m/s2.
d) 11.1 m/s2.
e) 12.8 m/s2.

9) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

a) 10.99 N.
b) 12.64 N.
c) 14.54 N.
d) 16.72 N.
e) 19.22 N.

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
a) 13.3 N.
b) 15.3 N.
c) 17.59 N.
d) 20.23 N.
e) 23.27 N.
12)
In the figure shown, θ1 is 17 degrees , and θ3 is 39 degrees . The mass has a weight of 42 N. What is the tension, T1?
a) 34.24 N.
b) 39.37 N.
c) 45.28 N.
d) 52.07 N.
e) 59.88 N.
13)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
a) 82 N
b) 94.3 N
c) 108.5 N
d) 124.8 N
e) 143.5 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

a) 3.05 minutes.
b) 3.51 minutes.
c) 4.03 minutes.
d) 4.64 minutes.
e) 5.33 minutes.

15) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

a) 9.4 newtons.
b) 10.8 newtons.
c) 12.4 newtons.
d) 14.3 newtons.
e) 16.4 newtons.

#### T2 E1

1) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

a) 3.05 minutes.
b) 3.51 minutes.
c) 4.03 minutes.
d) 4.64 minutes.
e) 5.33 minutes.

2) A 2.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.59 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

a) 6.9 m/s2.
b) 8 m/s2.
c) 9.2 m/s2.
d) 10.6 m/s2.
e) 12.1 m/s2.

3) If you toss a coin into the air, the acceleration on the way up is

a) down
b) zero
c) up

4) As the Moon circles Earth, the acceleration of the Moon is

a) zero
b) towards Earth
c) opposite the direction of the Moon's velocity
d) in the same direction as the Moon's velocity
e) away from Earth

5) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) down
c) zero
6)
In the figure shown, θ1 is 17 degrees , and θ3 is 39 degrees . The mass has a weight of 42 N. What is the tension, T1?
a) 34.24 N.
b) 39.37 N.
c) 45.28 N.
d) 52.07 N.
e) 59.88 N.
7)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
a) 31.26 N.
b) 35.95 N.
c) 41.34 N.
d) 47.54 N.
e) 54.68 N.

8) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 2.6 s
b) 2.99 s
c) 3.43 s
d) 3.95 s
e) 4.54 s

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) the cloth is accelerating for such a brief time that there is little motion
c) objects don't begin to accelerate until after the force has been applied

10) If you toss a coin into the air, the velocity on the way up is

a) down
b) up
c) zero
11)
In the figure shown, the mass of m1 is 6 kg, and the mass of m2 is 3.2 kg. If the external force, Fext on m2 is 173 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.31, and that for m2 the coefficient is 0.44 .
a) 110.2 N
b) 126.7 N
c) 145.7 N
d) 167.6 N
e) 192.7 N

12) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

a) 9.4 newtons.
b) 10.8 newtons.
c) 12.4 newtons.
d) 14.3 newtons.
e) 16.4 newtons.

13) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.5N at an angle of 51 degress above the horizontal. What is the normal force?

a) 13.61 N.
b) 15.66 N.
c) 18 N.
d) 20.71 N.
e) 23.81 N.

14) If you toss a coin into the air, the velocity on the way down is

a) down
b) up
c) zero

15) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southwest
c) northeast
d) north
e) northwest

#### T2 E2

1) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

a) 6.4 m/s2.
b) 7.3 m/s2.
c) 8.4 m/s2.
d) 9.7 m/s2.
e) 11.1 m/s2.
2)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
a) 32.66 N.
b) 37.56 N.
c) 43.2 N.
d) 49.68 N.
e) 57.13 N.
3)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
a) 22.7 N.
b) 26.11 N.
c) 30.02 N.
d) 34.53 N.
e) 39.71 N.

4) If you toss a coin into the air, the acceleration on the way up is

a) zero
b) down
c) up
5)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 2.9 kg. If the external force, Fext on m2 is 132 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.37, and that for m2 the coefficient is 0.48 .
a) 89.1 N
b) 102.5 N
c) 117.9 N
d) 135.5 N
e) 155.9 N

6) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.15 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.77 minutes.
b) 6.63 minutes.
c) 7.63 minutes.
d) 8.77 minutes.
e) 10.09 minutes.

7) If you toss a coin into the air, the velocity on the way down is

a) zero
b) up
c) down

8) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 0.68 s
b) 0.78 s
c) 0.9 s
d) 1.03 s
e) 1.19 s

9) If you toss a coin into the air, the velocity on the way up is

a) down
b) up
c) zero

10) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

a) 8.6 newtons.
b) 9.9 newtons.
c) 11.4 newtons.
d) 13.1 newtons.
e) 15.1 newtons.

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) north
c) south
d) northwest
e) northeast

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

13) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) zero
c) towards Earth
d) opposite the direction of the Moon's velocity
e) away from Earth

14) A sled of mass 5.2 kg is at rest on a rough surface. A string pulls with a tension of 45.3N at an angle of 59 degress above the horizontal. What is the normal force?

a) 10.55 N.
b) 12.13 N.
c) 13.95 N.
d) 16.04 N.
e) 18.45 N.

15) If you toss a coin into the air, the velocity while it as its highest point is

a) zero
b) up
c) down

### T2 F0

1) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

2) If you toss a coin into the air, the velocity on the way up is

a) zero
b) up
c) down

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) southwest
c) northwest
d) south
e) northeast

4) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) south
c) northwest
d) north
e) southeast

5) A car is traveling east and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) south
b) zero
c) west
d) east
e) north

7) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

8) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.7
b) 0.84
c) 1.01
d) 1.21
e) 1.45

9) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

a) 24.29 N.
b) 27.93 N.
c) 32.12 N.
d) 36.94 N.
e) 42.48 N.

10) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 2.6 s
b) 2.99 s
c) 3.43 s
d) 3.95 s
e) 4.54 s
11)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
a) 22.7 N.
b) 26.11 N.
c) 30.02 N.
d) 34.53 N.
e) 39.71 N.
13)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
a) 6.3 m/s2
b) 7.2 m/s2
c) 8.3 m/s2
d) 9.5 m/s2
e) 11 m/s2

14) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

a) 16.3 newtons.
b) 18.8 newtons.
c) 21.6 newtons.
d) 24.8 newtons.
e) 28.5 newtons.

15) What is the gravitational acceleration on a plant that is 1.34 times more massive than Earth, and a radius that is 1.88 times greater than Earths?

a) 2.4 m/s2
b) 2.8 m/s2
c) 3.2 m/s2
d) 3.7 m/s2
e) 4.3 m/s2

#### T2 F1

1) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s

2) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the east
c) to the west
3)
In the figure shown (with m1 = 5.4 kg, m2 = 2.3 kg, and Fext = 138 N), what is the acceleration? Assume no friction is present.
a) 10.2 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 17.9 m/s2

4) If you toss a coin into the air, the velocity on the way up is

a) zero
b) down
c) up

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southwest
c) northeast
d) south
e) north

6) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

a) 4.8 m/s2
b) 5.5 m/s2
c) 6.4 m/s2
d) 7.3 m/s2
e) 8.4 m/s2

7) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

a) 21.31 N.
b) 24.5 N.
c) 28.18 N.
d) 32.4 N.
e) 37.26 N.

8) If you toss a coin into the air, the acceleration on the way down is

a) up
b) down
c) zero
9)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
a) 34.19 N.
b) 39.32 N.
c) 45.21 N.
d) 52 N.
e) 59.79 N.

10) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

11) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

a) 9.4 newtons.
b) 10.8 newtons.
c) 12.4 newtons.
d) 14.3 newtons.
e) 16.4 newtons.

12) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) east
b) zero
c) west
d) south
e) north

13) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.44
b) 0.53
c) 0.64
d) 0.76
e) 0.92

14) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) northwest
c) southeast
d) south
e) north
15)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T1?
a) 30.9 N.
b) 37.1 N.
c) 44.5 N.
d) 53.5 N.
e) 64.1 N.

#### T2 F2

1)
In the figure shown (with m1 = 5.4 kg, m2 = 3.9 kg, and Fext = 136 N), what is the acceleration? Assume no friction is present.
a) 12.7 m/s2
b) 14.6 m/s2
c) 16.8 m/s2
d) 19.3 m/s2
e) 22.2 m/s2

2) A car is traveling east and slowing down. The acceleration is

a) to the east
b) zero
c) to the west

3) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) south
b) north
c) west
d) east
e) zero

4) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down

5) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.52
b) 0.63
c) 0.76
d) 0.91
e) 1.09

6) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 0.68 s
b) 0.78 s
c) 0.9 s
d) 1.03 s
e) 1.19 s

7) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

a) 24.29 N.
b) 27.93 N.
c) 32.12 N.
d) 36.94 N.
e) 42.48 N.

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) north
c) south
d) southwest
e) northwest

9) If you toss a coin into the air, the velocity on the way up is

a) up
b) zero
c) down
10)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
a) 46.5 N.
b) 55.8 N.
c) 67 N.
d) 80.4 N.
e) 96.5 N.
11)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
a) 29.52 N.
b) 33.95 N.
c) 39.04 N.
d) 44.9 N.
e) 51.63 N.

12) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

a) 16.3 newtons.
b) 18.8 newtons.
c) 21.6 newtons.
d) 24.8 newtons.
e) 28.5 newtons.

13) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) north
c) southeast
d) northeast
e) northwest

14) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) down
c) zero

15) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

a) 4.8 m/s2
b) 5.5 m/s2
c) 6.4 m/s2
d) 7.3 m/s2
e) 8.4 m/s2

### T2 G0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is accelerating for such a brief time that there is little motion

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northwest
c) north
d) northeast
e) southwest

3) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) southeast
c) south
d) northwest
e) west

4) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northwest
c) southeast
d) south
e) northeast

5) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

6) A car is traveling east and speeding up. The acceleration is

a) to the west
b) to the east
c) zero

7) If you toss a coin into the air, the acceleration on the way down is

a) up
b) down
c) zero

8) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.7
b) 0.84
c) 1.01
d) 1.21
e) 1.45

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

10) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 1.27 s
b) 1.46 s
c) 1.68 s
d) 1.93 s
e) 2.22 s
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
a) 13.3 N.
b) 15.3 N.
c) 17.59 N.
d) 20.23 N.
e) 23.27 N.
12)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
a) 34.19 N.
b) 39.32 N.
c) 45.21 N.
d) 52 N.
e) 59.79 N.
13)
In the figure shown (with m1 = 5.1 kg, m2 = 3.5 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
a) 13.7 m/s2
b) 15.7 m/s2
c) 18.1 m/s2
d) 20.8 m/s2
e) 23.9 m/s2

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.168 rad/sec. How many minutes does it take to complete 6.5 revolutions?

a) 2.66 minutes.
b) 3.06 minutes.
c) 3.52 minutes.
d) 4.05 minutes.
e) 4.66 minutes.

15) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

a) 10.3 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 18 m/s2

#### T2 G1

1)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
a) 29.52 N.
b) 33.95 N.
c) 39.04 N.
d) 44.9 N.
e) 51.63 N.

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.41 minutes.
b) 6.22 minutes.
c) 7.15 minutes.
d) 8.22 minutes.
e) 9.46 minutes.
3)
In the figure shown (with m1 = 5.4 kg, m2 = 3.9 kg, and Fext = 136 N), what is the acceleration? Assume no friction is present.
a) 12.7 m/s2
b) 14.6 m/s2
c) 16.8 m/s2
d) 19.3 m/s2
e) 22.2 m/s2

4) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

a) 4.7 m/s2
b) 5.4 m/s2
c) 6.2 m/s2
d) 7.2 m/s2
e) 8.3 m/s2

5) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) south
c) northeast
d) north
e) northwest

6) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the east
c) to the west

7) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) southeast
c) north
d) south
e) northwest

8) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 0.68 s
b) 0.78 s
c) 0.9 s
d) 1.03 s
e) 1.19 s

9) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down

10) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

a) 23.15 N.
b) 26.62 N.
c) 30.62 N.
d) 35.21 N.
e) 40.49 N.

11) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southwest
c) southeast
d) northwest
e) west

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is more slippery when it is pulled quickly
c) the cloth is accelerating for such a brief time that there is little motion
13)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
a) 6.27 N.
b) 7.22 N.
c) 8.3 N.
d) 9.54 N.
e) 10.97 N.

14) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.1
b) 0.12
c) 0.14
d) 0.17
e) 0.2

15) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the east
c) to the west

#### T2 G2

1) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) down
c) up
2)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
a) 34.19 N.
b) 39.32 N.
c) 45.21 N.
d) 52 N.
e) 59.79 N.

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) south
c) southwest
d) northwest
e) north

4) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

5) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.
6)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
a) 6.3 m/s2
b) 7.2 m/s2
c) 8.3 m/s2
d) 9.5 m/s2
e) 11 m/s2

7) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.1
b) 0.12
c) 0.14
d) 0.17
e) 0.2

8) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the east
c) to the west
9)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the tension, T1?
a) 36.22 N.
b) 41.66 N.
c) 47.91 N.
d) 55.09 N.
e) 63.36 N.

10) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is accelerating for such a brief time that there is little motion

11) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

a) 1.25 s
b) 1.44 s
c) 1.65 s
d) 1.9 s
e) 2.18 s

12) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) southeast
c) south
d) northwest
e) north

13) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

14) What is the gravitational acceleration on a plant that is 1.34 times more massive than Earth, and a radius that is 1.88 times greater than Earths?

a) 2.4 m/s2
b) 2.8 m/s2
c) 3.2 m/s2
d) 3.7 m/s2
e) 4.3 m/s2

15) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) southeast
c) west
d) northwest
e) south

### T2 H0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) zero
c) down

3) If you toss a coin into the air, the velocity on the way up is

a) up
b) zero
c) down

4) If you toss a coin into the air, the velocity on the way down is

a) down
b) up
c) zero

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northwest
c) northeast
d) southwest
e) north

6) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) southeast
c) north
d) northeast
e) northeast

7) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) west
c) southeast
d) southwest
e) south

8) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.31
b) 0.37
c) 0.44
d) 0.53
e) 0.64

9) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

a) 1.87 s
b) 2.15 s
c) 2.47 s
d) 2.85 s
e) 3.27 s

10) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees
11)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.
12)
In the figure shown, θ1 is 17 degrees , and θ3 is 29 degrees . The mass has a weight of 29 N. What is the tension, T1?
a) 20.16 N.
b) 23.18 N.
c) 26.66 N.
d) 30.66 N.
e) 35.26 N.

13) Nine barefoot baseball players, with a total mass of 664 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.53 . The net mass of the (shoed) basketball team is 418 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.334
b) 0.367
c) 0.404
d) 0.444
e) 0.488

14) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.025
d) 0.029
e) 0.033

15) What is the gravitational acceleration on a plant that is 1.73 times more dense than Earth, and a radius that is 2.44 times greater than Earth's?

a) 41.4 m/s2
b) 47.6 m/s2
c) 54.7 m/s2
d) 62.9 m/s2
e) 72.4 m/s2

#### T2 H1

1) Nine barefoot baseball players, with a total mass of 692 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 406 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.358
b) 0.394
c) 0.433
d) 0.476
e) 0.524

2) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.5 m/s2?

a) 70.3 degrees
b) 80.9 degrees
c) 93 degrees
d) 106.9 degrees
e) 123 degrees

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) north
c) southwest
d) northwest
e) northeast

4) If you toss a coin into the air, the velocity on the way down is

a) up
b) down
c) zero
5)
In the figure shown, θ1 is 20 degrees , and θ3 is 33 degrees . The mass has a weight of 31 N. What is the tension, T1?
a) 32.55 N.
b) 37.44 N.
c) 43.05 N.
d) 49.51 N.
e) 56.94 N.

6) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

a) 0.017
b) 0.02
c) 0.023
d) 0.026
e) 0.03

7) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) west
b) northwest
c) south
d) southeast
e) southwest

8) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

a) 1.05 s
b) 1.21 s
c) 1.39 s
d) 1.6 s
e) 1.84 s

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is more slippery when it is pulled quickly
c) the cloth is accelerating for such a brief time that there is little motion

10) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.44
b) 0.53
c) 0.64
d) 0.76
e) 0.92

11) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) up
c) zero

12) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

a) 24 m/s2
b) 27.7 m/s2
c) 31.8 m/s2
d) 36.6 m/s2
e) 42.1 m/s2

13) If you toss a coin into the air, the velocity on the way up is

a) up
b) down
c) zero

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) southeast
c) northeast
d) northeast
e) north
15)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
a) 32.5 N.
b) 39 N.
c) 46.8 N.
d) 56.2 N.
e) 67.4 N.

#### T2 H2

1) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) zero
c) down

2) Nine barefoot baseball players, with a total mass of 692 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 406 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.358
b) 0.394
c) 0.433
d) 0.476
e) 0.524

3) What is the gravitational acceleration on a plant that is 2.98 times more dense than Earth, and a radius that is 1.81 times greater than Earth's?

a) 30.2 m/s2
b) 34.8 m/s2
c) 40 m/s2
d) 46 m/s2
e) 52.9 m/s2

4) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

a) 0.017
b) 0.02
c) 0.023
d) 0.026
e) 0.03

5) If you toss a coin into the air, the velocity on the way up is

a) down
b) up
c) zero

6) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.44
b) 0.53
c) 0.64
d) 0.76
e) 0.92

7) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

8) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) southeast
b) north
c) northeast
d) northeast
e) northwest
9)
In the figure shown, θ1 is 17 degrees , and θ3 is 33 degrees . The mass has a 'weight' of 33 N. What is the tension, T1?
a) 27.32 N.
b) 31.42 N.
c) 36.13 N.
d) 41.55 N.
e) 47.78 N.

10) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees

11) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) southeast
c) west
d) northwest
e) south

12) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

a) 1.25 s
b) 1.44 s
c) 1.65 s
d) 1.9 s
e) 2.18 s
13)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
a) 21.2 N.
b) 25.4 N.
c) 30.5 N.
d) 36.6 N.
e) 43.9 N.

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) north
c) southwest
d) northeast
e) northwest

15) If you toss a coin into the air, the velocity on the way down is

a) up
b) down
c) zero

### T2 I0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) the cloth is accelerating for such a brief time that there is little motion
c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) north
c) northeast
d) south
e) southwest

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) northwest
c) southeast
d) south
e) west

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southeast
b) south
c) north
d) northeast
e) northwest

6) If you toss a coin into the air, the acceleration on the way up is

a) zero
b) up
c) down

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) south
b) east
c) zero
d) west
e) north

8) A mass with weight (mg) equal to 21 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 66 degrees with respect to the horizontal. What is the tension in each string?

a) 6.6 N.
b) 7.6 N.
c) 8.7 N.
d) 10 N.
e) 11.5 N.

9) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

a) 53.7 degrees
b) 61.8 degrees
c) 71 degrees
d) 81.7 degrees
e) 93.9 degrees

11) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

a) 18.6 N.
b) 21.4 N.
c) 24.6 N.
d) 28.3 N.
e) 32.6 N.
12)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
a) 21.2 N.
b) 25.4 N.
c) 30.5 N.
d) 36.6 N.
e) 43.9 N.
13)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
a) 66.7 N
b) 76.7 N
c) 88.3 N
d) 101.5 N
e) 116.7 N

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

a) 0.006
b) 0.007
c) 0.008
d) 0.009
e) 0.01

15) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

a) 10.3 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 18 m/s2

#### T2 I1

1) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

a) 0.017
b) 0.02
c) 0.023
d) 0.026
e) 0.03

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) south
c) north
d) northeast
e) southwest

3) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up
4)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
a) 66.7 N
b) 76.7 N
c) 88.3 N
d) 101.5 N
e) 116.7 N

5) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) west
b) zero
c) south
d) east
e) north

6) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

a) 27.4 N.
b) 31.5 N.
c) 36.2 N.
d) 41.7 N.
e) 47.9 N.

7) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

a) 1.87 s
b) 2.15 s
c) 2.47 s
d) 2.85 s
e) 3.27 s

8) In the figure "3 tensions" shown above θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the weight?

a) 20.1 N.
b) 23.1 N.
c) 26.6 N.
d) 30.5 N.
e) 35.1 N.

9) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) south
c) southeast
d) north
e) northeast
10)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.

11) What is the gravitational acceleration on a plant that is 1.83 times more massive than Earth, and a radius that is 1.38 times greater than Earths?

a) 8.2 m/s2
b) 9.4 m/s2
c) 10.8 m/s2
d) 12.5 m/s2
e) 14.3 m/s2

12) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southeast
c) southwest
d) south
e) west

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly

14) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees

15) If you toss a coin into the air, the acceleration on the way up is

a) down
b) zero
c) up

#### T2 I2

1) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) west
b) zero
c) east
d) south
e) north

2) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

a) 53.7 degrees
b) 61.8 degrees
c) 71 degrees
d) 81.7 degrees
e) 93.9 degrees

3) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

a) 0.008
b) 0.009
c) 0.01
d) 0.012
e) 0.014

4) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) down
c) zero
5)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
a) 34.8 N.
b) 41.8 N.
c) 50.2 N.
d) 60.2 N.
e) 72.3 N.

6) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

a) 1.05 s
b) 1.21 s
c) 1.39 s
d) 1.6 s
e) 1.84 s

7) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northeast
c) north
d) southeast
e) northwest

8) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly
9)
In the figure shown, the mass of m1 is 6 kg, and the mass of m2 is 3.2 kg. If the external force, Fext on m2 is 173 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.31, and that for m2 the coefficient is 0.44 .
a) 110.2 N
b) 126.7 N
c) 145.7 N
d) 167.6 N
e) 192.7 N

10) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southeast
b) southwest
c) west
d) south
e) northwest

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) north
c) southwest
d) south
e) northwest

12) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

a) 27.4 N.
b) 31.5 N.
c) 36.2 N.
d) 41.7 N.
e) 47.9 N.
13)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
a) 20.1 N.
b) 23.1 N.
c) 26.6 N.
d) 30.6 N.
e) 35.2 N.

14) If you toss a coin into the air, the acceleration on the way up is

a) zero
b) up
c) down

15) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

a) 10.3 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 18 m/s2

### T2 J0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) down
c) up

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northeast
c) northwest
d) south
e) southwest

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) northeast
c) south
d) southwest
e) north

5) A car is traveling east and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

6) A car is traveling east and speeding up. The acceleration is

a) to the west
b) zero
c) to the east

7) If you toss a coin into the air, the acceleration on the way up is

a) up
b) zero
c) down

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

a) 12.8 N.
b) 14.8 N.
c) 17 N.
d) 19.5 N.
e) 22.5 N.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

10) A sled of mass 5.2 kg is at rest on a rough surface. A string pulls with a tension of 45.3N at an angle of 59 degress above the horizontal. What is the normal force?

a) 10.55 N.
b) 12.13 N.
c) 13.95 N.
d) 16.04 N.
e) 18.45 N.
11)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
a) 26.66 N.
b) 30.66 N.
c) 35.25 N.
d) 40.54 N.
e) 46.62 N.

12) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

a) 23.7 N.
b) 27.3 N.
c) 31.4 N.
d) 36.1 N.
e) 41.5 N.
13)
In the figure shown (with m1 = 5.1 kg, m2 = 3.5 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
a) 13.7 m/s2
b) 15.7 m/s2
c) 18.1 m/s2
d) 20.8 m/s2
e) 23.9 m/s2

14) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

a) 7.7 newtons.
b) 8.8 newtons.
c) 10.2 newtons.
d) 11.7 newtons.
e) 13.4 newtons.

15) What is the gravitational acceleration on a plant that is 1.23 times more dense than Earth, and a radius that is 1.83 times greater than Earth's?

a) 19.2 m/s2
b) 22.1 m/s2
c) 25.4 m/s2
d) 29.2 m/s2
e) 33.5 m/s2

#### T2 J1

1) A car is traveling east and speeding up. The acceleration is

a) to the west
b) to the east
c) zero

2) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

3) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

4) What is the gravitational acceleration on a plant that is 1.94 times more dense than Earth, and a radius that is 2.35 times greater than Earth's?

a) 38.9 m/s2
b) 44.7 m/s2
c) 51.4 m/s2
d) 59.1 m/s2
e) 67.9 m/s2

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) southwest
b) northeast
c) northwest
d) north
e) south

6) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) down
c) up
7)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
a) 31.26 N.
b) 35.95 N.
c) 41.34 N.
d) 47.54 N.
e) 54.68 N.

8) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

a) 16.3 newtons.
b) 18.8 newtons.
c) 21.6 newtons.
d) 24.8 newtons.
e) 28.5 newtons.
9)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
a) 9 m/s2
b) 10.3 m/s2
c) 11.8 m/s2
d) 13.6 m/s2
e) 15.7 m/s2

10) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

a) 23.45 N.
b) 26.97 N.
c) 31.02 N.
d) 35.67 N.
e) 41.02 N.

11) A mass with weight (mg) of 48 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 46 degrees. What is the tension in the string?

a) 22.7 N.
b) 26.1 N.
c) 30 N.
d) 34.5 N.
e) 39.7 N.

12) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) south
c) southwest
d) northwest
e) north

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is accelerating for such a brief time that there is little motion
c) the cloth is more slippery when it is pulled quickly

14) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

15) In the figure "3 tensions" shown above θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the weight?

a) 20.1 N.
b) 23.1 N.
c) 26.6 N.
d) 30.5 N.
e) 35.1 N.

#### T2 J2

1) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the west
c) to the east

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) northwest
c) southwest
d) north
e) south

3) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

a) 24.29 N.
b) 27.93 N.
c) 32.12 N.
d) 36.94 N.
e) 42.48 N.

4) A mass with weight (mg) of 39 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 56 degrees. What is the tension in the string?

a) 22.1 N.
b) 25.4 N.
c) 29.2 N.
d) 33.6 N.
e) 38.6 N.

5) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

a) 32.4 newtons.
b) 37.2 newtons.
c) 42.8 newtons.
d) 49.2 newtons.
e) 56.6 newtons.
6)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
a) 31.26 N.
b) 35.95 N.
c) 41.34 N.
d) 47.54 N.
e) 54.68 N.

7) In the figure "3 tensions" shown above θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the weight?

a) 5.9 N.
b) 6.8 N.
c) 7.8 N.
d) 9 N.
e) 10.4 N.

8) If you toss a coin into the air, the acceleration on the way up is

a) down
b) zero
c) up

9) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

a) 24 m/s2
b) 27.7 m/s2
c) 31.8 m/s2
d) 36.6 m/s2
e) 42.1 m/s2

10) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northeast
c) northwest
d) north
e) southwest

11) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

a) 10.99 N.
b) 12.64 N.
c) 14.54 N.
d) 16.72 N.
e) 19.22 N.
12)
In the figure shown (with m1 = 5.1 kg, m2 = 3.5 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
a) 13.7 m/s2
b) 15.7 m/s2
c) 18.1 m/s2
d) 20.8 m/s2
e) 23.9 m/s2

13) A car is traveling east and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

14) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) up
c) zero

15) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) the cloth is accelerating for such a brief time that there is little motion
c) objects don't begin to accelerate until after the force has been applied

### T2 K0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the velocity on the way up is

a) down
b) up
c) zero

3) If you toss a coin into the air, the velocity on the way down is

a) zero
b) up
c) down

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southeast
c) west
d) south
e) southwest

5) A car is traveling west and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) west
b) north
c) east
d) zero
e) south

7) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) zero
c) away from Earth
d) towards Earth
e) opposite the direction of the Moon's velocity

8) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.1
b) 0.12
c) 0.14
d) 0.17
e) 0.2

9) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 2.6 s
b) 2.99 s
c) 3.43 s
d) 3.95 s
e) 4.54 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

a) 74 degrees
b) 85.1 degrees
c) 97.8 degrees
d) 112.5 degrees
e) 129.4 degrees
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
a) 32.66 N.
b) 37.56 N.
c) 43.2 N.
d) 49.68 N.
e) 57.13 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T2?
a) 66.58 N.
b) 76.56 N.
c) 88.05 N.
d) 101.25 N.
e) 116.44 N.
13)
In the figure shown, the mass of m1 is 5.2 kg, and the mass of m2 is 2.9 kg. If the external force, Fext on m2 is 179 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.36, and that for m2 the coefficient is 0.46 .
a) 74.4 N
b) 85.5 N
c) 98.3 N
d) 113.1 N
e) 130.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.

15) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

a) 8.6 newtons.
b) 9.9 newtons.
c) 11.4 newtons.
d) 13.1 newtons.
e) 15.1 newtons.

#### T2 K1

1) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees

2) If you toss a coin into the air, the velocity on the way down is

a) up
b) zero
c) down

3) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) south
c) west
d) southeast
e) southwest
4)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
a) 6.27 N.
b) 7.22 N.
c) 8.3 N.
d) 9.54 N.
e) 10.97 N.
5)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
a) 66.7 N
b) 76.7 N
c) 88.3 N
d) 101.5 N
e) 116.7 N

6) As the Moon circles Earth, the acceleration of the Moon is

a) opposite the direction of the Moon's velocity
b) towards Earth
c) zero
d) away from Earth
e) in the same direction as the Moon's velocity

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) east
b) west
c) south
d) north
e) zero

8) A car is traveling west and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

9) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 0.68 s
b) 0.78 s
c) 0.9 s
d) 1.03 s
e) 1.19 s
10)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
a) 60.54 N.
b) 69.62 N.
c) 80.06 N.
d) 92.07 N.
e) 105.88 N.

11) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.198 rad/sec. How many minutes does it take to complete 10.5 revolutions?

a) 4.83 minutes.
b) 5.55 minutes.
c) 6.39 minutes.
d) 7.34 minutes.
e) 8.45 minutes.

12) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

a) 4.4 newtons.
b) 5.1 newtons.
c) 5.9 newtons.
d) 6.8 newtons.
e) 7.8 newtons.

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is accelerating for such a brief time that there is little motion
c) the cloth is more slippery when it is pulled quickly

14) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.52
b) 0.63
c) 0.76
d) 0.91
e) 1.09

15) If you toss a coin into the air, the velocity on the way up is

a) down
b) zero
c) up

#### T2 K2

1) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) west
c) south
d) northwest
e) southeast

2) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

3) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) zero
c) opposite the direction of the Moon's velocity
d) in the same direction as the Moon's velocity
e) away from Earth

4) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

a) 53.7 degrees
b) 61.8 degrees
c) 71 degrees
d) 81.7 degrees
e) 93.9 degrees

5) A car is traveling west and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

6) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.93 minutes.
b) 6.82 minutes.
c) 7.84 minutes.
d) 9.02 minutes.
e) 10.37 minutes.

7) If you toss a coin into the air, the velocity on the way down is

a) up
b) down
c) zero

8) A mass with weight (mg) 10.8 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.53 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.38
b) 0.46
c) 0.55
d) 0.66
e) 0.79

9) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) south
b) east
c) north
d) west
e) zero
10)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
a) 82 N
b) 94.3 N
c) 108.5 N
d) 124.8 N
e) 143.5 N
11)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
a) 30.78 N.
b) 35.4 N.
c) 40.71 N.
d) 46.82 N.
e) 53.84 N.

12) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 0.68 s
b) 0.78 s
c) 0.9 s
d) 1.03 s
e) 1.19 s
13)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
a) 13.3 N.
b) 15.3 N.
c) 17.59 N.
d) 20.23 N.
e) 23.27 N.

14) If you toss a coin into the air, the velocity on the way up is

a) zero
b) up
c) down

15) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

a) 32.4 newtons.
b) 37.2 newtons.
c) 42.8 newtons.
d) 49.2 newtons.
e) 56.6 newtons.

### T2 L0

1) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) zero
c) down

2) If you toss a coin into the air, the velocity on the way down is

a) down
b) up
c) zero

3) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) zero
c) down

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) northwest
c) northeast
d) south
e) north

5) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) north
b) northeast
c) northwest
d) northeast
e) southeast

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) south
b) north
c) east
d) zero
e) west

7) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

8) A mass with weight (mg) equal to 33 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 72 degrees with respect to the horizontal. What is the tension in each string?

a) 9.9 N.
b) 11.4 N.
c) 13.1 N.
d) 15.1 N.
e) 17.3 N.

9) A sled of mass 5.5 kg is at rest on a rough surface. A string pulls with a tension of 41.3N at an angle of 34 degress above the horizontal. What is the normal force?

a) 26.79 N.
b) 30.81 N.
c) 35.43 N.
d) 40.74 N.
e) 46.85 N.

10) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees

11) In the figure "3 tensions" shown above θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the weight?

a) 5.9 N.
b) 6.8 N.
c) 7.8 N.
d) 9 N.
e) 10.4 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
a) 36.74 N.
b) 42.25 N.
c) 48.58 N.
d) 55.87 N.
e) 64.25 N.

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.422
b) 0.465
c) 0.511
d) 0.562
e) 0.619

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 73.9 kg person to stand2.94 meters from the center, without grabbing something?

a) 0.017
b) 0.019
c) 0.022
d) 0.025
e) 0.029

15) What is the gravitational acceleration on a plant that is 1.94 times more dense than Earth, and a radius that is 2.35 times greater than Earth's?

a) 38.9 m/s2
b) 44.7 m/s2
c) 51.4 m/s2
d) 59.1 m/s2
e) 67.9 m/s2

#### T2 L1

1)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
a) 36.74 N.
b) 42.25 N.
c) 48.58 N.
d) 55.87 N.
e) 64.25 N.

2) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

a) 61.1 N.
b) 70.3 N.
c) 80.8 N.
d) 92.9 N.
e) 106.9 N.

3) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

a) 0.03
b) 0.034
c) 0.039
d) 0.045
e) 0.052

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) northeast
c) northeast
d) north
e) southeast

5) Nine barefoot baseball players, with a total mass of 679 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 380 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.31
b) 0.341
c) 0.376
d) 0.413
e) 0.454

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) zero
b) north
c) south
d) west
e) east

7) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees

8) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

a) 25.5 N.
b) 29.3 N.
c) 33.7 N.
d) 38.7 N.
e) 44.5 N.

9) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northwest
c) southwest
d) northeast
e) south

10) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) down
c) zero

11) If you toss a coin into the air, the acceleration on the way down is

a) up
b) zero
c) down

12) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

13) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 41.9N at an angle of 42 degress above the horizontal. What is the normal force?

a) 18.94 N.
b) 21.78 N.
c) 25.05 N.
d) 28.8 N.
e) 33.12 N.

14) If you toss a coin into the air, the velocity while it as its highest point is

a) down
b) up
c) zero

15) What is the gravitational acceleration on a plant that is 1.29 times more dense than Earth, and a radius that is 1.53 times greater than Earth's?

a) 12.7 m/s2
b) 14.6 m/s2
c) 16.8 m/s2
d) 19.3 m/s2
e) 22.2 m/s2

#### T2 L2

1) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) west
b) north
c) south
d) east
e) zero

2) Nine barefoot baseball players, with a total mass of 625 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.54 . The net mass of the (shoed) basketball team is 445 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.263
b) 0.289
c) 0.318
d) 0.35
e) 0.384

3) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) zero
c) down

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) north
b) northeast
c) southeast
d) northeast
e) northwest

5) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

a) 0.03
b) 0.034
c) 0.039
d) 0.045
e) 0.052

6) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees

7) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

a) 24 m/s2
b) 27.7 m/s2
c) 31.8 m/s2
d) 36.6 m/s2
e) 42.1 m/s2

8) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

a) 16.81 N.
b) 19.33 N.
c) 22.23 N.
d) 25.57 N.
e) 29.4 N.

9) If you toss a coin into the air, the velocity on the way down is

a) zero
b) down
c) up

10) If you toss a coin into the air, the velocity while it as its highest point is

a) zero
b) up
c) down

11) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) down
c) up
12)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the weight?
a) 13.6 N.
b) 15.6 N.
c) 17.9 N.
d) 20.6 N.
e) 23.7 N.
13)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
a) 30.78 N.
b) 35.4 N.
c) 40.71 N.
d) 46.82 N.
e) 53.84 N.

14) A mass with weight (mg) equal to 44 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 60 degrees with respect to the horizontal. What is the tension in each string?

a) 14.5 N.
b) 16.7 N.
c) 19.2 N.
d) 22.1 N.
e) 25.4 N.

15) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northwest
c) south
d) southwest
e) northeast

### T2 M0

1) If you toss a coin into the air, the velocity on the way up is

a) down
b) up
c) zero

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northeast
c) southwest
d) north
e) northwest

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) north
b) northwest
c) southwest
d) northeast
e) south

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) south
c) southeast
d) southwest
e) west

5) A car is traveling east and speeding up. The acceleration is

a) to the west
b) to the east
c) zero

6) As the Moon circles Earth, the acceleration of the Moon is

a) away from Earth
b) towards Earth
c) zero
d) opposite the direction of the Moon's velocity
e) in the same direction as the Moon's velocity

7) If you toss a coin into the air, the acceleration on the way down is

a) down
b) up
c) zero

8) A mass with weight (mg) equal to 33 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 72 degrees with respect to the horizontal. What is the tension in each string?

a) 9.9 N.
b) 11.4 N.
c) 13.1 N.
d) 15.1 N.
e) 17.3 N.

9) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

a) 16.81 N.
b) 19.33 N.
c) 22.23 N.
d) 25.57 N.
e) 29.4 N.

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

a) 1.4 s
b) 1.61 s
c) 1.86 s
d) 2.13 s
e) 2.45 s

11) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

a) 23.7 N.
b) 27.3 N.
c) 31.4 N.
d) 36.1 N.
e) 41.5 N.
12)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
a) 45.03 N.
b) 51.78 N.
c) 59.55 N.
d) 68.48 N.
e) 78.75 N.

13) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.36 . But the team wins a game of tug of war due to their superior mass of 683 kg. They are playing against a 5 person basketball team with a net mass of 406 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.455
b) 0.501
c) 0.551
d) 0.606
e) 0.666

14) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

a) 16.3 newtons.
b) 18.8 newtons.
c) 21.6 newtons.
d) 24.8 newtons.
e) 28.5 newtons.

15) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

a) 8.3 m/s2
b) 9.5 m/s2
c) 11 m/s2
d) 12.6 m/s2
e) 14.5 m/s2

#### T2 M1

1) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.23 . But the team wins a game of tug of war due to their superior mass of 675 kg. They are playing against a 5 person basketball team with a net mass of 394 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.394
b) 0.433
c) 0.477
d) 0.524
e) 0.577
2)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
a) 39.08 N.
b) 44.94 N.
c) 51.69 N.
d) 59.44 N.
e) 68.35 N.

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) south
c) northwest
d) southwest
e) northeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) north
b) south
c) northeast
d) southwest
e) northwest

5) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 41.9N at an angle of 42 degress above the horizontal. What is the normal force?

a) 18.94 N.
b) 21.78 N.
c) 25.05 N.
d) 28.8 N.
e) 33.12 N.

6) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

a) 27.4 N.
b) 31.5 N.
c) 36.2 N.
d) 41.7 N.
e) 47.9 N.

7) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s

8) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) away from Earth
c) opposite the direction of the Moon's velocity
d) zero
e) in the same direction as the Moon's velocity

9) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

a) 8.3 m/s2
b) 9.5 m/s2
c) 11 m/s2
d) 12.6 m/s2
e) 14.5 m/s2

10) A car is traveling east and speeding up. The acceleration is

a) to the west
b) zero
c) to the east

11) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down

12) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) west
b) southeast
c) southwest
d) south
e) northwest

13) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

a) 25.5 N.
b) 29.3 N.
c) 33.7 N.
d) 38.7 N.
e) 44.5 N.

14) If you toss a coin into the air, the velocity on the way up is

a) up
b) down
c) zero

15) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 51.9 kg person who is standing 1.26 meters from the center?

a) 6.1 newtons.
b) 7 newtons.
c) 8 newtons.
d) 9.2 newtons.
e) 10.6 newtons.

#### T2 M2

1) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 40.1N at an angle of 42 degress above the horizontal. What is the normal force?

a) 29.03 N.
b) 33.38 N.
c) 38.39 N.
d) 44.15 N.
e) 50.77 N.

2) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) west
b) south
c) northwest
d) southeast
e) southwest

3) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

a) 4.7 m/s2
b) 5.4 m/s2
c) 6.2 m/s2
d) 7.2 m/s2
e) 8.3 m/s2

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) north
c) southwest
d) northeast
e) northwest

5) If you toss a coin into the air, the velocity on the way up is

a) up
b) down
c) zero

6) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) down
c) up
7)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
a) 39.08 N.
b) 44.94 N.
c) 51.69 N.
d) 59.44 N.
e) 68.35 N.

8) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) zero
c) opposite the direction of the Moon's velocity
d) towards Earth
e) away from Earth

9) A car is traveling east and speeding up. The acceleration is

a) to the west
b) zero
c) to the east

10) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.23 . But the team wins a game of tug of war due to their superior mass of 607 kg. They are playing against a 5 person basketball team with a net mass of 429 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.269
b) 0.296
c) 0.325
d) 0.358
e) 0.394

11) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

a) 4.4 newtons.
b) 5.1 newtons.
c) 5.9 newtons.
d) 6.8 newtons.
e) 7.8 newtons.

12) In the figure "3 tensions" shown above θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the weight?

a) 40.3 N.
b) 46.4 N.
c) 53.3 N.
d) 61.3 N.
e) 70.5 N.

13) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) southwest
c) south
d) northwest
e) north

14) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s

15) A mass with weight (mg) equal to 41 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 30 degrees with respect to the horizontal. What is the tension in each string?

a) 23.4 N.
b) 27 N.
c) 31 N.
d) 35.7 N.
e) 41 N.

### T2 N0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) the cloth is accelerating for such a brief time that there is little motion
c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) down
c) up

3) If you toss a coin into the air, the velocity on the way up is

a) up
b) zero
c) down

4) A car is traveling west and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

5) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

6) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

7) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) away from Earth
c) zero
d) opposite the direction of the Moon's velocity
e) in the same direction as the Moon's velocity

8) A mass with weight (mg) equal to 21 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 66 degrees with respect to the horizontal. What is the tension in each string?

a) 6.6 N.
b) 7.6 N.
c) 8.7 N.
d) 10 N.
e) 11.5 N.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

a) 74 degrees
b) 85.1 degrees
c) 97.8 degrees
d) 112.5 degrees
e) 129.4 degrees
11)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
a) 46.5 N.
b) 55.8 N.
c) 67 N.
d) 80.4 N.
e) 96.5 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
a) 29.52 N.
b) 33.95 N.
c) 39.04 N.
d) 44.9 N.
e) 51.63 N.
13)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
a) 82 N
b) 94.3 N
c) 108.5 N
d) 124.8 N
e) 143.5 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.41 minutes.
b) 6.22 minutes.
c) 7.15 minutes.
d) 8.22 minutes.
e) 9.46 minutes.

15) What is the gravitational acceleration on a plant that is 1.83 times more massive than Earth, and a radius that is 1.38 times greater than Earths?

a) 8.2 m/s2
b) 9.4 m/s2
c) 10.8 m/s2
d) 12.5 m/s2
e) 14.3 m/s2

#### T2 N1

1)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
a) 82 N
b) 94.3 N
c) 108.5 N
d) 124.8 N
e) 143.5 N

2) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 59 degrees with respect to the horizontal. What is the tension in each string?

a) 21.3 N.
b) 24.5 N.
c) 28.2 N.
d) 32.4 N.
e) 37.3 N.

3) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) opposite the direction of the Moon's velocity
c) in the same direction as the Moon's velocity
d) away from Earth
e) zero

4) What is the gravitational acceleration on a plant that is 1.83 times more massive than Earth, and a radius that is 1.38 times greater than Earths?

a) 8.2 m/s2
b) 9.4 m/s2
c) 10.8 m/s2
d) 12.5 m/s2
e) 14.3 m/s2
5)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
a) 22.7 N.
b) 26.11 N.
c) 30.02 N.
d) 34.53 N.
e) 39.71 N.

6) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.

8) A car is traveling west and slowing down. The acceleration is

a) to the east
b) zero
c) to the west

9) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

a) 21.31 N.
b) 24.5 N.
c) 28.18 N.
d) 32.4 N.
e) 37.26 N.

10) If you toss a coin into the air, the velocity on the way up is

a) zero
b) up
c) down

11) If you toss a coin into the air, the acceleration on the way up is

a) down
b) zero
c) up

12) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) down
c) up

13) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the east
c) to the west

14) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is accelerating for such a brief time that there is little motion
c) the cloth is more slippery when it is pulled quickly
15)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
a) 21.2 N.
b) 25.4 N.
c) 30.5 N.
d) 36.6 N.
e) 43.9 N.

#### T2 N2

1) If you toss a coin into the air, the velocity on the way up is

a) down
b) up
c) zero

2) If you toss a coin into the air, the acceleration on the way up is

a) down
b) up
c) zero
3)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
a) 34.8 N.
b) 41.8 N.
c) 50.2 N.
d) 60.2 N.
e) 72.3 N.

4) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) down
c) up

5) A car is traveling west and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

6) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly

7) As the Moon circles Earth, the acceleration of the Moon is

a) away from Earth
b) opposite the direction of the Moon's velocity
c) zero
d) in the same direction as the Moon's velocity
e) towards Earth
8)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
a) 34.19 N.
b) 39.32 N.
c) 45.21 N.
d) 52 N.
e) 59.79 N.

9) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

a) 61.1 N.
b) 70.3 N.
c) 80.8 N.
d) 92.9 N.
e) 106.9 N.

10) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

11) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

12) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees
13)
In the figure shown, the mass of m1 is 5.2 kg, and the mass of m2 is 2.9 kg. If the external force, Fext on m2 is 179 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.36, and that for m2 the coefficient is 0.46 .
a) 74.4 N
b) 85.5 N
c) 98.3 N
d) 113.1 N
e) 130.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

a) 3.05 minutes.
b) 3.51 minutes.
c) 4.03 minutes.
d) 4.64 minutes.
e) 5.33 minutes.

15) What is the gravitational acceleration on a plant that is 1.34 times more massive than Earth, and a radius that is 1.45 times greater than Earths?

a) 4.7 m/s2
b) 5.4 m/s2
c) 6.2 m/s2
d) 7.2 m/s2
e) 8.3 m/s2

### T2 O0

1) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) northeast
c) south
d) north
e) southwest

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) northwest
c) north
d) south
e) northeast

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) north
c) southeast
d) northwest
e) northeast

4) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northwest
c) south
d) southeast
e) northeast

5) A car is traveling west and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

6) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

7) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) away from Earth
c) towards Earth
d) zero
e) opposite the direction of the Moon's velocity

8) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

a) 11.4 N.
b) 13.1 N.
c) 15.1 N.
d) 17.4 N.
e) 20 N.

9) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 2.6 s
b) 2.99 s
c) 3.43 s
d) 3.95 s
e) 4.54 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 48.4 degrees
b) 55.7 degrees
c) 64 degrees
d) 73.6 degrees
e) 84.7 degrees
11)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
a) 45.03 N.
b) 51.78 N.
c) 59.55 N.
d) 68.48 N.
e) 78.75 N.
12)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
a) 32.5 N.
b) 39 N.
c) 46.8 N.
d) 56.2 N.
e) 67.4 N.
13)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 141 N, what is the tension in the connecting string? Assume no friction is present.
a) 58.2 N
b) 67 N
c) 77 N
d) 88.6 N
e) 101.8 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.

15) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

a) 0.008
b) 0.009
c) 0.01
d) 0.012
e) 0.014

#### T2 O1

1) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

a) 1.87 s
b) 2.15 s
c) 2.47 s
d) 2.85 s
e) 3.27 s

2) A car is traveling west and slowing down. The acceleration is

a) to the east
b) zero
c) to the west
3)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T1?
a) 40.7 N.
b) 48.9 N.
c) 58.7 N.
d) 70.4 N.
e) 84.5 N.

4) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.168 rad/sec. How many minutes does it take to complete 6.5 revolutions?

a) 2.66 minutes.
b) 3.06 minutes.
c) 3.52 minutes.
d) 4.05 minutes.
e) 4.66 minutes.

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northwest
c) north
d) northeast
e) southwest

6) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) in the same direction as the Moon's velocity
c) zero
d) opposite the direction of the Moon's velocity
e) away from Earth

7) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) southeast
b) north
c) northeast
d) northeast
e) northwest
8)
In the figure shown, the mass of m1 is 5.1 kg, and the mass of m2 is 2.8 kg. If the external force, Fext on m2 is 148 N, what is the tension in the connecting string? Assume no friction is present.
a) 95.5 N
b) 109.9 N
c) 126.4 N
d) 145.3 N
e) 167.1 N

9) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees

10) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southeast
c) northwest
d) northeast
e) north
11)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
a) 45.03 N.
b) 51.78 N.
c) 59.55 N.
d) 68.48 N.
e) 78.75 N.

12) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) northeast
c) south
d) north
e) northwest

13) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 73.9 kg person to stand2.94 meters from the center, without grabbing something?

a) 0.017
b) 0.019
c) 0.022
d) 0.025
e) 0.029

15) A mass with weight (mg) of 49 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 54 degrees. What is the tension in the string?

a) 27.5 N.
b) 31.6 N.
c) 36.4 N.
d) 41.8 N.
e) 48.1 N.

#### T2 O2

1) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees

2) As the Moon circles Earth, the acceleration of the Moon is

a) zero
b) in the same direction as the Moon's velocity
c) away from Earth
d) opposite the direction of the Moon's velocity
e) towards Earth

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) south
c) northwest
d) northeast
e) southeast
4)
In the figure shown, the mass of m1 is 5.1 kg, and the mass of m2 is 2.8 kg. If the external force, Fext on m2 is 148 N, what is the tension in the connecting string? Assume no friction is present.
a) 95.5 N
b) 109.9 N
c) 126.4 N
d) 145.3 N
e) 167.1 N
5)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
a) 30.78 N.
b) 35.4 N.
c) 40.71 N.
d) 46.82 N.
e) 53.84 N.

6) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) north
c) southwest
d) northeast
e) south

7) A mass with weight (mg) of 42 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 46 degrees. What is the tension in the string?

a) 15 N.
b) 17.3 N.
c) 19.8 N.
d) 22.8 N.
e) 26.2 N.

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) southwest
c) south
d) north
e) northwest

9) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.

10) A car is traveling west and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

11) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

12) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

a) 0.006
b) 0.007
c) 0.008
d) 0.009
e) 0.01

13) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 0.68 s
b) 0.78 s
c) 0.9 s
d) 1.03 s
e) 1.19 s

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) northeast
c) southeast
d) northeast
e) north
15)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T1?
a) 30.9 N.
b) 37.1 N.
c) 44.5 N.
d) 53.5 N.
e) 64.1 N.

### T2 P0

1) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) up
c) down

2) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) down
c) zero

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) north
c) northwest
d) northeast
e) southwest

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) west
b) northwest
c) southwest
d) southeast
e) south

5) A car is traveling east and speeding up. The acceleration is

a) to the east
b) to the west
c) zero

6) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) towards Earth
c) opposite the direction of the Moon's velocity
d) zero
e) away from Earth

7) If you toss a coin into the air, the acceleration on the way down is

a) up
b) zero
c) down

8) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

a) 6.4 m/s2.
b) 7.3 m/s2.
c) 8.4 m/s2.
d) 9.7 m/s2.
e) 11.1 m/s2.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

a) 10.99 N.
b) 12.64 N.
c) 14.54 N.
d) 16.72 N.
e) 19.22 N.
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
a) 32.66 N.
b) 37.56 N.
c) 43.2 N.
d) 49.68 N.
e) 57.13 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
a) 34.8 N.
b) 41.8 N.
c) 50.2 N.
d) 60.2 N.
e) 72.3 N.

13) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.21 . But the team wins a game of tug of war due to their superior mass of 683 kg. They are playing against a 5 person basketball team with a net mass of 389 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.277
b) 0.305
c) 0.335
d) 0.369
e) 0.406

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.41 minutes.
b) 6.22 minutes.
c) 7.15 minutes.
d) 8.22 minutes.
e) 9.46 minutes.

15) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

a) 4.1 m/s2
b) 4.7 m/s2
c) 5.4 m/s2
d) 6.2 m/s2
e) 7.2 m/s2

#### T2 P1

1) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

a) 4.1 m/s2
b) 4.7 m/s2
c) 5.4 m/s2
d) 6.2 m/s2
e) 7.2 m/s2

2) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

3) A 2.5 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 11 N. What is the magnitude (absolute value) of the acceleration?

a) 7.3 m/s2.
b) 8.4 m/s2.
c) 9.7 m/s2.
d) 11.1 m/s2.
e) 12.8 m/s2.

4) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) zero
c) down

5) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 40.1N at an angle of 42 degress above the horizontal. What is the normal force?

a) 29.03 N.
b) 33.38 N.
c) 38.39 N.
d) 44.15 N.
e) 50.77 N.

6) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.15 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.77 minutes.
b) 6.63 minutes.
c) 7.63 minutes.
d) 8.77 minutes.
e) 10.09 minutes.
7)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
a) 46.5 N.
b) 55.8 N.
c) 67 N.
d) 80.4 N.
e) 96.5 N.

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) southwest
c) north
d) northeast
e) northwest

9) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southwest
c) south
d) west
e) southeast

10) As the Moon circles Earth, the acceleration of the Moon is

a) zero
b) in the same direction as the Moon's velocity
c) towards Earth
d) away from Earth
e) opposite the direction of the Moon's velocity
11)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
a) 31.26 N.
b) 35.95 N.
c) 41.34 N.
d) 47.54 N.
e) 54.68 N.

12) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.38 . But the team wins a game of tug of war due to their superior mass of 671 kg. They are playing against a 5 person basketball team with a net mass of 438 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.481
b) 0.529
c) 0.582
d) 0.64
e) 0.704

13) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the east
c) to the west

14) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

a) 23.15 N.
b) 26.62 N.
c) 30.62 N.
d) 35.21 N.
e) 40.49 N.

15) If you toss a coin into the air, the velocity while it as its highest point is

a) zero
b) down
c) up

#### T2 P2

1) If you toss a coin into the air, the velocity while it as its highest point is

a) down
b) up
c) zero
2)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
a) 11.96 N.
b) 13.75 N.
c) 15.82 N.
d) 18.19 N.
e) 20.92 N.

3) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down

4) A 3.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.29 . In addition to the surface friction, there is also an air drag equal to 21 N. What is the magnitude (absolute value) of the acceleration?

a) 8.2 m/s2.
b) 9.4 m/s2.
c) 10.8 m/s2.
d) 12.4 m/s2.
e) 14.3 m/s2.

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) north
c) southwest
d) northeast
e) northwest

6) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 40.1N at an angle of 42 degress above the horizontal. What is the normal force?

a) 29.03 N.
b) 33.38 N.
c) 38.39 N.
d) 44.15 N.
e) 50.77 N.

7) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) west
b) northwest
c) southwest
d) south
e) southeast

8) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

9) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) zero
c) towards Earth
d) away from Earth
e) opposite the direction of the Moon's velocity

10) A car is traveling east and speeding up. The acceleration is

a) to the east
b) to the west
c) zero

11) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.21 . But the team wins a game of tug of war due to their superior mass of 683 kg. They are playing against a 5 person basketball team with a net mass of 389 kg. What is the maximum coefficient of static friction of the basketball team?

a) 0.277
b) 0.305
c) 0.335
d) 0.369
e) 0.406

12) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

a) 4.7 m/s2
b) 5.4 m/s2
c) 6.2 m/s2
d) 7.2 m/s2
e) 8.3 m/s2

13) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.93 minutes.
b) 6.82 minutes.
c) 7.84 minutes.
d) 9.02 minutes.
e) 10.37 minutes.

14) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.
15)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T1?
a) 40.7 N.
b) 48.9 N.
c) 58.7 N.
d) 70.4 N.
e) 84.5 N.

### T2 Q0

1) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) down
c) zero

2) If you toss a coin into the air, the velocity on the way down is

a) zero
b) down
c) up

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) north
c) southwest
d) northwest
e) south

4) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the west
c) to the east

5) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) south
b) west
c) north
d) east
e) zero

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) west
b) north
c) south
d) east
e) zero

8) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

a) 11.4 N.
b) 13.1 N.
c) 15.1 N.
d) 17.4 N.
e) 20 N.

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

a) 1.25 s
b) 1.44 s
c) 1.65 s
d) 1.9 s
e) 2.18 s

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees
11)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
a) 60.54 N.
b) 69.62 N.
c) 80.06 N.
d) 92.07 N.
e) 105.88 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
a) 22.7 N.
b) 26.11 N.
c) 30.02 N.
d) 34.53 N.
e) 39.71 N.
13)
In the figure shown, the mass of m1 is 5.1 kg, and the mass of m2 is 3.5 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
a) 45.8 N
b) 52.6 N
c) 60.5 N
d) 69.6 N
e) 80.1 N

14) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

a) 32.4 newtons.
b) 37.2 newtons.
c) 42.8 newtons.
d) 49.2 newtons.
e) 56.6 newtons.

15) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

a) 0.008
b) 0.009
c) 0.01
d) 0.012
e) 0.014

#### T2 Q1

1) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 77.6 kg person to stand1.59 meters from the center, without grabbing something?

a) 0.008
b) 0.009
c) 0.011
d) 0.012
e) 0.014

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

3) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

a) 11.4 N.
b) 13.1 N.
c) 15.1 N.
d) 17.4 N.
e) 20 N.

4) If you toss a coin into the air, the acceleration on the way up is

a) up
b) zero
c) down

5) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees

6) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) southwest
c) north
d) northeast
e) south

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) south
b) zero
c) north
d) east
e) west
8)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
a) 60.54 N.
b) 69.62 N.
c) 80.06 N.
d) 92.07 N.
e) 105.88 N.

9) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

a) 9.4 newtons.
b) 10.8 newtons.
c) 12.4 newtons.
d) 14.3 newtons.
e) 16.4 newtons.
10)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
a) 74.4 N
b) 85.5 N
c) 98.4 N
d) 113.1 N
e) 130.1 N

11) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the west
c) to the east

12) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 2.6 s
b) 2.99 s
c) 3.43 s
d) 3.95 s
e) 4.54 s
13)
In the figure shown, θ1 is 20 degrees , and θ3 is 33 degrees . The mass has a weight of 31 N. What is the tension, T1?
a) 32.55 N.
b) 37.44 N.
c) 43.05 N.
d) 49.51 N.
e) 56.94 N.

14) If you toss a coin into the air, the velocity on the way down is

a) zero
b) up
c) down

15) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) east
b) west
c) north
d) zero
e) south

#### T2 Q2

1)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 2.3 kg. If the external force, Fext on m2 is 138 N, what is the tension in the connecting string? Assume no friction is present.
a) 84.2 N
b) 96.8 N
c) 111.3 N
d) 128 N
e) 147.2 N
2)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
a) 22.7 N.
b) 26.11 N.
c) 30.02 N.
d) 34.53 N.
e) 39.71 N.

3) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

a) 0.021
b) 0.024
c) 0.028
d) 0.032
e) 0.036

4) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

a) 12.8 N.
b) 14.8 N.
c) 17 N.
d) 19.5 N.
e) 22.5 N.

5) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

a) 1.4 s
b) 1.61 s
c) 1.86 s
d) 2.13 s
e) 2.45 s

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) north
b) zero
c) east
d) south
e) west

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) south
b) west
c) east
d) north
e) zero

8) A car is traveling east and speeding up. The acceleration is

a) to the west
b) zero
c) to the east

9) If you toss a coin into the air, the velocity on the way down is

a) zero
b) down
c) up

10) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

a) 4.4 newtons.
b) 5.1 newtons.
c) 5.9 newtons.
d) 6.8 newtons.
e) 7.8 newtons.

11) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

12) If you toss a coin into the air, the acceleration on the way up is

a) down
b) zero
c) up

13) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

a) 74 degrees
b) 85.1 degrees
c) 97.8 degrees
d) 112.5 degrees
e) 129.4 degrees
14)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
a) 30.78 N.
b) 35.4 N.
c) 40.71 N.
d) 46.82 N.
e) 53.84 N.

15) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) northwest
c) northeast
d) north
e) southwest

### T2 R0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) up
c) down

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) north
c) southeast
d) northeast
e) northwest

4) A car is traveling west and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

5) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the east
c) to the west

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) west
b) east
c) zero
d) north
e) south

7) As the Moon circles Earth, the acceleration of the Moon is

a) away from Earth
b) opposite the direction of the Moon's velocity
c) zero
d) towards Earth
e) in the same direction as the Moon's velocity

8) A 3 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.27 . In addition to the surface friction, there is also an air drag equal to 7 N. What is the magnitude (absolute value) of the acceleration?

a) 3.8 m/s2.
b) 4.3 m/s2.
c) 5 m/s2.
d) 5.7 m/s2.
e) 6.6 m/s2.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

10) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 0.68 s
b) 0.78 s
c) 0.9 s
d) 1.03 s
e) 1.19 s
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
a) 11.96 N.
b) 13.75 N.
c) 15.82 N.
d) 18.19 N.
e) 20.92 N.

12) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

a) 23.7 N.
b) 27.3 N.
c) 31.4 N.
d) 36.1 N.
e) 41.5 N.
13)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
a) 82 N
b) 94.3 N
c) 108.5 N
d) 124.8 N
e) 143.5 N

14) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

a) 8.6 newtons.
b) 9.9 newtons.
c) 11.4 newtons.
d) 13.1 newtons.
e) 15.1 newtons.

15) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

a) 0.006
b) 0.007
c) 0.008
d) 0.009
e) 0.01

#### T2 R1

1) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

a) 25.5 N.
b) 29.3 N.
c) 33.7 N.
d) 38.7 N.
e) 44.5 N.

2) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

a) 7.7 newtons.
b) 8.8 newtons.
c) 10.2 newtons.
d) 11.7 newtons.
e) 13.4 newtons.

3) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) up
c) down

4) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

5) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 77.6 kg person to stand1.59 meters from the center, without grabbing something?

a) 0.008
b) 0.009
c) 0.011
d) 0.012
e) 0.014

6) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

7) A car is traveling west and slowing down. The acceleration is

a) to the east
b) to the west
c) zero
8)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
a) 26.66 N.
b) 30.66 N.
c) 35.25 N.
d) 40.54 N.
e) 46.62 N.
9)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
a) 66.7 N
b) 76.7 N
c) 88.3 N
d) 101.5 N
e) 116.7 N

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

a) 1.89 s
b) 2.18 s
c) 2.5 s
d) 2.88 s
e) 3.31 s

11) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) southeast
b) northwest
c) north
d) northeast
e) northeast

12) As the Moon circles Earth, the acceleration of the Moon is

a) away from Earth
b) in the same direction as the Moon's velocity
c) opposite the direction of the Moon's velocity
d) zero
e) towards Earth

13) A 2.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.59 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

a) 6.9 m/s2.
b) 8 m/s2.
c) 9.2 m/s2.
d) 10.6 m/s2.
e) 12.1 m/s2.

14) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the west
c) to the east

15) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) east
b) west
c) north
d) south
e) zero

#### T2 R2

1)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
a) 10.01 N.
b) 11.51 N.
c) 13.23 N.
d) 15.22 N.
e) 17.5 N.

2) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

3) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) away from Earth
c) opposite the direction of the Moon's velocity
d) zero
e) in the same direction as the Moon's velocity

4) A car is traveling west and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

5) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

a) 0.03
b) 0.034
c) 0.039
d) 0.045
e) 0.052

6) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) northeast
c) northeast
d) southeast
e) north

7) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

a) 6.4 m/s2.
b) 7.3 m/s2.
c) 8.4 m/s2.
d) 9.7 m/s2.
e) 11.1 m/s2.

8) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) north
b) south
c) east
d) west
e) zero

9) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

10) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the west
c) to the east
11)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 3.1 kg. If the external force, Fext on m2 is 137 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.47 .
a) 56.7 N
b) 65.2 N
c) 74.9 N
d) 86.2 N
e) 99.1 N

12) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

a) 8.6 newtons.
b) 9.9 newtons.
c) 11.4 newtons.
d) 13.1 newtons.
e) 15.1 newtons.

13) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

a) 1.25 s
b) 1.44 s
c) 1.65 s
d) 1.9 s
e) 2.18 s

14) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is accelerating for such a brief time that there is little motion

15) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

a) 23.7 N.
b) 27.3 N.
c) 31.4 N.
d) 36.1 N.
e) 41.5 N.

### T2 S0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the velocity on the way up is

a) down
b) zero
c) up

3) If you toss a coin into the air, the velocity while it as its highest point is

a) down
b) zero
c) up

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) south
c) north
d) northwest
e) southwest

5) A car is traveling west and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

6) A car is traveling east and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) east
b) zero
c) west
d) south
e) north

8) A 3.1 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.43 . In addition to the surface friction, there is also an air drag equal to 12 N. What is the magnitude (absolute value) of the acceleration?

a) 4.6 m/s2.
b) 5.3 m/s2.
c) 6.1 m/s2.
d) 7 m/s2.
e) 8.1 m/s2.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees
11)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
a) 26.66 N.
b) 30.66 N.
c) 35.25 N.
d) 40.54 N.
e) 46.62 N.

12) In the figure "3 tensions" shown above θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the weight?

a) 40.3 N.
b) 46.4 N.
c) 53.3 N.
d) 61.3 N.
e) 70.5 N.
13)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
a) 9 m/s2
b) 10.3 m/s2
c) 11.8 m/s2
d) 13.6 m/s2
e) 15.7 m/s2

14) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

a) 0.021
b) 0.024
c) 0.028
d) 0.032
e) 0.036

15) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

a) 4.1 m/s2
b) 4.7 m/s2
c) 5.4 m/s2
d) 6.2 m/s2
e) 7.2 m/s2

#### T2 S1

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is more slippery when it is pulled quickly
c) the cloth is accelerating for such a brief time that there is little motion
2)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
a) 13.3 N.
b) 15.3 N.
c) 17.59 N.
d) 20.23 N.
e) 23.27 N.

3) A car is traveling east and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northwest
c) northeast
d) southwest
e) north

5) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

a) 4.8 m/s2
b) 5.5 m/s2
c) 6.4 m/s2
d) 7.3 m/s2
e) 8.4 m/s2

6) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

a) 36.3 degrees
b) 41.7 degrees
c) 47.9 degrees
d) 55.1 degrees
e) 63.4 degrees

7) In the figure "3 tensions" shown above θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the weight?

a) 5.9 N.
b) 6.8 N.
c) 7.8 N.
d) 9 N.
e) 10.4 N.

8) If you toss a coin into the air, the velocity on the way up is

a) up
b) zero
c) down

9) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

a) 0.021
b) 0.024
c) 0.028
d) 0.032
e) 0.036
10)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
a) 9 m/s2
b) 10.3 m/s2
c) 11.8 m/s2
d) 13.6 m/s2
e) 15.7 m/s2

11) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) west
b) east
c) south
d) zero
e) north

12) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) down
c) zero

13) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

a) 23.15 N.
b) 26.62 N.
c) 30.62 N.
d) 35.21 N.
e) 40.49 N.

14) A car is traveling west and slowing down. The acceleration is

a) to the west
b) zero
c) to the east

15) A 3.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.29 . In addition to the surface friction, there is also an air drag equal to 21 N. What is the magnitude (absolute value) of the acceleration?

a) 8.2 m/s2.
b) 9.4 m/s2.
c) 10.8 m/s2.
d) 12.4 m/s2.
e) 14.3 m/s2.

#### T2 S2

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is more slippery when it is pulled quickly
b) the cloth is accelerating for such a brief time that there is little motion
c) objects don't begin to accelerate until after the force has been applied

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) south
c) north
d) southwest
e) northeast
3)
In the figure shown (with m1 = 5.1 kg, m2 = 2.8 kg, and Fext = 148 N), what is the acceleration? Assume no friction is present.
a) 14.2 m/s2
b) 16.3 m/s2
c) 18.7 m/s2
d) 21.5 m/s2
e) 24.8 m/s2
4)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the weight?
a) 13.6 N.
b) 15.6 N.
c) 17.9 N.
d) 20.6 N.
e) 23.7 N.

5) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

a) 24.29 N.
b) 27.93 N.
c) 32.12 N.
d) 36.94 N.
e) 42.48 N.

6) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

a) 4.1 m/s2
b) 4.7 m/s2
c) 5.4 m/s2
d) 6.2 m/s2
e) 7.2 m/s2

7) If you toss a coin into the air, the velocity on the way up is

a) zero
b) up
c) down

8) A 3.1 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.43 . In addition to the surface friction, there is also an air drag equal to 12 N. What is the magnitude (absolute value) of the acceleration?

a) 4.6 m/s2.
b) 5.3 m/s2.
c) 6.1 m/s2.
d) 7 m/s2.
e) 8.1 m/s2.

9) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

a) west
b) zero
c) east
d) north
e) south

10) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.025
d) 0.029
e) 0.033

11) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

12) A car is traveling west and slowing down. The acceleration is

a) to the east
b) zero
c) to the west

13) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees

14) If you toss a coin into the air, the velocity while it as its highest point is

a) down
b) up
c) zero
15)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
a) 32.66 N.
b) 37.56 N.
c) 43.2 N.
d) 49.68 N.
e) 57.13 N.

### T2 T0

1) If you toss a coin into the air, the velocity on the way up is

a) down
b) zero
c) up

2) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) north
c) south
d) northeast
e) northwest

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) west
c) southeast
d) south
e) northwest

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southeast
b) northeast
c) south
d) northwest
e) north

6) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) south
b) zero
c) east
d) west
e) north

8) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.7
b) 0.84
c) 1.01
d) 1.21
e) 1.45

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 19.64 N.
b) 22.59 N.
c) 25.98 N.
d) 29.88 N.
e) 34.36 N.

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 48.4 degrees
b) 55.7 degrees
c) 64 degrees
d) 73.6 degrees
e) 84.7 degrees
11)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
a) 26.66 N.
b) 30.66 N.
c) 35.25 N.
d) 40.54 N.
e) 46.62 N.

12) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

a) 25.5 N.
b) 29.3 N.
c) 33.7 N.
d) 38.7 N.
e) 44.5 N.

13) Nine barefoot baseball players, with a total mass of 625 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.54 . The net mass of the (shoed) basketball team is 445 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.263
b) 0.289
c) 0.318
d) 0.35
e) 0.384

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.188 rad/sec. How many minutes does it take to complete 6.5 revolutions?

a) 2.74 minutes.
b) 3.15 minutes.
c) 3.62 minutes.
d) 4.16 minutes.
e) 4.79 minutes.

15) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

a) 0.006
b) 0.007
c) 0.008
d) 0.009
e) 0.01

#### T2 T1

1) If you toss a coin into the air, the velocity on the way down is

a) zero
b) down
c) up

2) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) northeast
c) south
d) north
e) southeast

3) If you toss a coin into the air, the velocity on the way up is

a) down
b) zero
c) up

4) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees

5) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

6) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

a) 18.6 N.
b) 21.4 N.
c) 24.6 N.
d) 28.3 N.
e) 32.6 N.
7)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
a) 10.01 N.
b) 11.51 N.
c) 13.23 N.
d) 15.22 N.
e) 17.5 N.

8) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

a) 3.05 minutes.
b) 3.51 minutes.
c) 4.03 minutes.
d) 4.64 minutes.
e) 5.33 minutes.

9) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) north
b) west
c) zero
d) east
e) south

10) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southwest
c) southeast
d) south
e) west

11) A car is traveling east and slowing down. The acceleration is

a) to the east
b) zero
c) to the west

12) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.447
b) 0.492
c) 0.541
d) 0.595
e) 0.655

13) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) northeast
c) north
d) northwest
e) south

14) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.52
b) 0.63
c) 0.76
d) 0.91
e) 1.09

15) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 73.9 kg person to stand2.94 meters from the center, without grabbing something?

a) 0.017
b) 0.019
c) 0.022
d) 0.025
e) 0.029

#### T2 T2

1) If you toss a coin into the air, the velocity on the way down is

a) up
b) down
c) zero

2) Nine barefoot baseball players, with a total mass of 679 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 380 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.31
b) 0.341
c) 0.376
d) 0.413
e) 0.454

3) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.026
d) 0.03
e) 0.034

4) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

5) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southwest
c) southeast
d) northwest
e) west

6) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southeast
c) northeast
d) northwest
e) north

7) If you toss a coin into the air, the velocity on the way up is

a) down
b) zero
c) up
8)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
a) 20.1 N.
b) 23.1 N.
c) 26.6 N.
d) 30.6 N.
e) 35.2 N.

9) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northeast
c) southwest
d) northwest
e) north

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

a) 17.21 N.
b) 19.79 N.
c) 22.76 N.
d) 26.17 N.
e) 30.1 N.
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
a) 32.66 N.
b) 37.56 N.
c) 43.2 N.
d) 49.68 N.
e) 57.13 N.

12) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) south
b) north
c) west
d) east
e) zero

13) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.198 rad/sec. How many minutes does it take to complete 10.5 revolutions?

a) 4.83 minutes.
b) 5.55 minutes.
c) 6.39 minutes.
d) 7.34 minutes.
e) 8.45 minutes.

14) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

a) 0.44
b) 0.53
c) 0.64
d) 0.76
e) 0.92

15) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees

### T2 U0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly

2) If you toss a coin into the air, the velocity on the way up is

a) down
b) zero
c) up

3) If you toss a coin into the air, the velocity while it as its highest point is

a) down
b) up
c) zero

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) northeast
c) north
d) northwest
e) south

5) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southeast
b) northwest
c) southwest
d) south
e) west

6) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) zero
c) opposite the direction of the Moon's velocity
d) away from Earth
e) towards Earth

7) If you toss a coin into the air, the acceleration on the way down is

a) up
b) down
c) zero

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 40 degrees. What is the tension in the string?

a) 11.2 N.
b) 12.9 N.
c) 14.8 N.
d) 17 N.
e) 19.6 N.

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

a) 1.27 s
b) 1.46 s
c) 1.68 s
d) 1.93 s
e) 2.22 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

a) 74 degrees
b) 85.1 degrees
c) 97.8 degrees
d) 112.5 degrees
e) 129.4 degrees
11)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
a) 6.27 N.
b) 7.22 N.
c) 8.3 N.
d) 9.54 N.
e) 10.97 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
a) 39.08 N.
b) 44.94 N.
c) 51.69 N.
d) 59.44 N.
e) 68.35 N.
13)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
a) 9 m/s2
b) 10.3 m/s2
c) 11.8 m/s2
d) 13.6 m/s2
e) 15.7 m/s2

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.

15) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 64.8 kg person who is standing 1.76 meters from the center?

a) 5 newtons.
b) 5.7 newtons.
c) 6.5 newtons.
d) 7.5 newtons.
e) 8.7 newtons.

#### T2 U1

1)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
a) 6.3 m/s2
b) 7.2 m/s2
c) 8.3 m/s2
d) 9.5 m/s2
e) 11 m/s2

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) northeast
c) south
d) north
e) northwest
3)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
a) 30.78 N.
b) 35.4 N.
c) 40.71 N.
d) 46.82 N.
e) 53.84 N.

4) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.41 minutes.
b) 6.22 minutes.
c) 7.15 minutes.
d) 8.22 minutes.
e) 9.46 minutes.

5) If you toss a coin into the air, the velocity on the way up is

a) zero
b) down
c) up

6) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

a) 1.05 s
b) 1.21 s
c) 1.39 s
d) 1.6 s
e) 1.84 s
7)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
a) 10.01 N.
b) 11.51 N.
c) 13.23 N.
d) 15.22 N.
e) 17.5 N.

8) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

a) 4.4 newtons.
b) 5.1 newtons.
c) 5.9 newtons.
d) 6.8 newtons.
e) 7.8 newtons.

9) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) southeast
b) west
c) south
d) southwest
e) northwest

10) If you toss a coin into the air, the acceleration on the way down is

a) down
b) zero
c) up

11) If you toss a coin into the air, the velocity while it as its highest point is

a) down
b) zero
c) up

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is more slippery when it is pulled quickly
c) the cloth is accelerating for such a brief time that there is little motion

13) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) away from Earth
c) opposite the direction of the Moon's velocity
d) in the same direction as the Moon's velocity
e) zero

14) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.5 m/s2?

a) 70.3 degrees
b) 80.9 degrees
c) 93 degrees
d) 106.9 degrees
e) 123 degrees

15) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

a) 11.4 N.
b) 13.1 N.
c) 15.1 N.
d) 17.4 N.
e) 20 N.

#### T2 U2

1) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) southwest
c) south
d) northwest
e) northeast

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

a) 5.41 minutes.
b) 6.22 minutes.
c) 7.15 minutes.
d) 8.22 minutes.
e) 9.46 minutes.

3) If you toss a coin into the air, the velocity on the way up is

a) zero
b) down
c) up

4) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

a) 53.3 degrees
b) 61.3 degrees
c) 70.5 degrees
d) 81.1 degrees
e) 93.3 degrees
5)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
a) 6.3 m/s2
b) 7.2 m/s2
c) 8.3 m/s2
d) 9.5 m/s2
e) 11 m/s2

6) A mass with weight (mg) of 27 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

a) 12.5 N.
b) 14.3 N.
c) 16.5 N.
d) 19 N.
e) 21.8 N.
7)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
a) 32.66 N.
b) 37.56 N.
c) 43.2 N.
d) 49.68 N.
e) 57.13 N.

8) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

a) 7.7 newtons.
b) 8.8 newtons.
c) 10.2 newtons.
d) 11.7 newtons.
e) 13.4 newtons.

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

a) 1.25 s
b) 1.44 s
c) 1.65 s
d) 1.9 s
e) 2.18 s

10) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) zero
c) down
11)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
a) 60.54 N.
b) 69.62 N.
c) 80.06 N.
d) 92.07 N.
e) 105.88 N.

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is more slippery when it is pulled quickly
c) the cloth is accelerating for such a brief time that there is little motion

13) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northwest
c) southwest
d) southeast
e) west

14) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) down
c) up

15) As the Moon circles Earth, the acceleration of the Moon is

a) in the same direction as the Moon's velocity
b) zero
c) towards Earth
d) away from Earth
e) opposite the direction of the Moon's velocity

### T2 V0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) objects don't begin to accelerate until after the force has been applied
b) the cloth is more slippery when it is pulled quickly
c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) down
c) zero

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) northwest
c) north
d) south
e) southwest

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) southwest
b) north
c) northeast
d) south
e) northwest

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) northeast
c) northwest
d) south
e) southeast

6) If you toss a coin into the air, the acceleration on the way up is

a) up
b) down
c) zero

7) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down

8) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

a) 11.4 N.
b) 13.1 N.
c) 15.1 N.
d) 17.4 N.
e) 20 N.

9) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

a) 17.21 N.
b) 19.79 N.
c) 22.76 N.
d) 26.17 N.
e) 30.1 N.

10) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

a) 23.45 N.
b) 26.97 N.
c) 31.02 N.
d) 35.67 N.
e) 41.02 N.
11)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
a) 36.74 N.
b) 42.25 N.
c) 48.58 N.
d) 55.87 N.
e) 64.25 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.
13)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
a) 74.4 N
b) 85.5 N
c) 98.4 N
d) 113.1 N
e) 130.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

a) 3.05 minutes.
b) 3.51 minutes.
c) 4.03 minutes.
d) 4.64 minutes.
e) 5.33 minutes.

15) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

a) 24 m/s2
b) 27.7 m/s2
c) 31.8 m/s2
d) 36.6 m/s2
e) 42.1 m/s2

#### T2 V1

1) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) south
c) southeast
d) northeast
e) northwest
2)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
a) 45.03 N.
b) 51.78 N.
c) 59.55 N.
d) 68.48 N.
e) 78.75 N.

3) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) up
c) zero
4)
In the figure shown, the mass of m1 is 7 kg, and the mass of m2 is 3.6 kg. If the external force, Fext on m2 is 153 N, what is the tension in the connecting string? Assume no friction is present.
a) 66.4 N
b) 76.4 N
c) 87.9 N
d) 101 N
e) 116.2 N

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) north
c) southwest
d) south
e) northeast

6) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.69 minutes.
b) 6.54 minutes.
c) 7.52 minutes.
d) 8.65 minutes.
e) 9.95 minutes.

8) If you toss a coin into the air, the acceleration on the way up is

a) zero
b) down
c) up

9) If you toss a coin into the air, the acceleration on the way down is

a) down
b) up
c) zero
10)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
a) 32.5 N.
b) 39 N.
c) 46.8 N.
d) 56.2 N.
e) 67.4 N.

11) What is the gravitational acceleration on a plant that is 1.94 times more dense than Earth, and a radius that is 2.35 times greater than Earth's?

a) 38.9 m/s2
b) 44.7 m/s2
c) 51.4 m/s2
d) 59.1 m/s2
e) 67.9 m/s2

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) the cloth is more slippery when it is pulled quickly
c) objects don't begin to accelerate until after the force has been applied

13) A mass with weight (mg) of 48 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 46 degrees. What is the tension in the string?

a) 22.7 N.
b) 26.1 N.
c) 30 N.
d) 34.5 N.
e) 39.7 N.

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) southwest
c) northwest
d) south
e) northeast

15) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

a) 23.45 N.
b) 26.97 N.
c) 31.02 N.
d) 35.67 N.
e) 41.02 N.

#### T2 V2

1) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) northeast
c) southeast
d) northwest
e) north

2) If you toss a coin into the air, the acceleration on the way down is

a) zero
b) up
c) down

3) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.44 minutes.
b) 6.25 minutes.
c) 7.19 minutes.
d) 8.27 minutes.
e) 9.51 minutes.
4)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
a) 74.4 N
b) 85.5 N
c) 98.4 N
d) 113.1 N
e) 130.1 N

5) If you toss a coin into the air, the acceleration on the way up is

a) up
b) zero
c) down

6) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

a) 21.31 N.
b) 24.5 N.
c) 28.18 N.
d) 32.4 N.
e) 37.26 N.
7)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.
8)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
a) 39.08 N.
b) 44.94 N.
c) 51.69 N.
d) 59.44 N.
e) 68.35 N.

9) What is the gravitational acceleration on a plant that is 1.29 times more dense than Earth, and a radius that is 1.53 times greater than Earth's?

a) 12.7 m/s2
b) 14.6 m/s2
c) 16.8 m/s2
d) 19.3 m/s2
e) 22.2 m/s2

10) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) north
c) northeast
d) south
e) southwest

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southwest
b) south
c) northeast
d) northwest
e) north

12) A sled of mass 5.5 kg is at rest on a rough surface. A string pulls with a tension of 41.3N at an angle of 34 degress above the horizontal. What is the normal force?

a) 26.79 N.
b) 30.81 N.
c) 35.43 N.
d) 40.74 N.
e) 46.85 N.

13) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) up
c) zero

14) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

a) the cloth is accelerating for such a brief time that there is little motion
b) objects don't begin to accelerate until after the force has been applied
c) the cloth is more slippery when it is pulled quickly

15) A mass with weight (mg) of 39 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 56 degrees. What is the tension in the string?

a) 22.1 N.
b) 25.4 N.
c) 29.2 N.
d) 33.6 N.
e) 38.6 N.

### T2 W0

1) If you toss a coin into the air, the acceleration while it as its highest point is

a) zero
b) down
c) up

2) If you toss a coin into the air, the velocity on the way up is

a) zero
b) down
c) up

3) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) north
c) northwest
d) south
e) southwest

5) If you toss a coin into the air, the acceleration on the way up is

a) down
b) zero
c) up

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) east
b) zero
c) west
d) north
e) south

7) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) in the same direction as the Moon's velocity
c) away from Earth
d) zero
e) opposite the direction of the Moon's velocity

8) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

a) 6.4 m/s2.
b) 7.3 m/s2.
c) 8.4 m/s2.
d) 9.7 m/s2.
e) 11.1 m/s2.

9) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

a) 21.31 N.
b) 24.5 N.
c) 28.18 N.
d) 32.4 N.
e) 37.26 N.

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees
11)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
a) 55.74 N.
b) 64.1 N.
c) 73.72 N.
d) 84.77 N.
e) 97.49 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.

13) Nine barefoot baseball players, with a total mass of 692 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 406 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.358
b) 0.394
c) 0.433
d) 0.476
e) 0.524

14) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

a) 10.3 m/s2
b) 11.8 m/s2
c) 13.6 m/s2
d) 15.6 m/s2
e) 18 m/s2

15) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

a) 20.5 m/s2
b) 23.5 m/s2
c) 27.1 m/s2
d) 31.1 m/s2
e) 35.8 m/s2

#### T2 W1

1)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
a) 55.74 N.
b) 64.1 N.
c) 73.72 N.
d) 84.77 N.
e) 97.49 N.

2) As the Moon circles Earth, the acceleration of the Moon is

a) towards Earth
b) zero
c) opposite the direction of the Moon's velocity
d) in the same direction as the Moon's velocity
e) away from Earth

3) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

a) 17.21 N.
b) 19.79 N.
c) 22.76 N.
d) 26.17 N.
e) 30.1 N.

4) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) south
b) east
c) north
d) zero
e) west

5) If you toss a coin into the air, the acceleration on the way up is

a) down
b) up
c) zero

6) A 2.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.59 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

a) 6.9 m/s2.
b) 8 m/s2.
c) 9.2 m/s2.
d) 10.6 m/s2.
e) 12.1 m/s2.

7) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

a) 56.3 degrees
b) 64.7 degrees
c) 74.4 degrees
d) 85.6 degrees
e) 98.4 degrees

8) If you toss a coin into the air, the acceleration while it as its highest point is

a) down
b) zero
c) up

9) What is the gravitational acceleration on a plant that is 2.01 times more dense than Earth, and a radius that is 1.54 times greater than Earth's?

a) 26.4 m/s2
b) 30.3 m/s2
c) 34.9 m/s2
d) 40.1 m/s2
e) 46.1 m/s2

10) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

a) 4.1 m/s2
b) 4.7 m/s2
c) 5.4 m/s2
d) 6.2 m/s2
e) 7.2 m/s2

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) southwest
b) north
c) south
d) northwest
e) northeast

12) If you toss a coin into the air, the velocity on the way up is

a) up
b) zero
c) down

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.447
b) 0.492
c) 0.541
d) 0.595
e) 0.655

14) If you toss a coin into the air, the velocity on the way down is

a) up
b) zero
c) down
15)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
a) 35.2 N.
b) 42.3 N.
c) 50.7 N.
d) 60.8 N.
e) 73 N.

#### T2 W2

1) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

a) 8.3 m/s2
b) 9.5 m/s2
c) 11 m/s2
d) 12.6 m/s2
e) 14.5 m/s2

2) If you toss a coin into the air, the velocity on the way up is

a) up
b) down
c) zero

3) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

a) 23.15 N.
b) 26.62 N.
c) 30.62 N.
d) 35.21 N.
e) 40.49 N.

4) If you toss a coin into the air, the acceleration on the way up is

a) zero
b) down
c) up
5)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
a) 34.8 N.
b) 41.8 N.
c) 50.2 N.
d) 60.2 N.
e) 72.3 N.

6) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) northeast
c) southwest
d) northwest
e) north

7) Nine barefoot baseball players, with a total mass of 672 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.59 . The net mass of the (shoed) basketball team is 407 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.295
b) 0.325
c) 0.357
d) 0.393
e) 0.432

8) A 2.3 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 16 N. What is the magnitude (absolute value) of the acceleration?

a) 7.2 m/s2.
b) 8.3 m/s2.
c) 9.5 m/s2.
d) 11 m/s2.
e) 12.6 m/s2.
9)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
a) 36.74 N.
b) 42.25 N.
c) 48.58 N.
d) 55.87 N.
e) 64.25 N.

10) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) zero
b) south
c) north
d) west
e) east

11) If you toss a coin into the air, the acceleration while it as its highest point is

a) up
b) down
c) zero

12) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

13) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees

14) As the Moon circles Earth, the acceleration of the Moon is

a) opposite the direction of the Moon's velocity
b) towards Earth
c) zero
d) in the same direction as the Moon's velocity
e) away from Earth

15) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

a) 20.5 m/s2
b) 23.5 m/s2
c) 27.1 m/s2
d) 31.1 m/s2
e) 35.8 m/s2

### T2 X0

1) If you toss a coin into the air, the velocity on the way down is

a) zero
b) up
c) down

2) If you toss a coin into the air, the velocity while it as its highest point is

a) down
b) up
c) zero

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) north
b) northwest
c) southeast
d) northeast
e) northeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) southwest
b) northeast
c) north
d) south
e) northwest

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southeast
c) north
d) northwest
e) northeast

6) A car is traveling west and slowing down. The acceleration is

a) to the west
b) to the east
c) zero

7) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 40 degrees. What is the tension in the string?

a) 11.2 N.
b) 12.9 N.
c) 14.8 N.
d) 17 N.
e) 19.6 N.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

10) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

a) 23.45 N.
b) 26.97 N.
c) 31.02 N.
d) 35.67 N.
e) 41.02 N.
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
a) 11.96 N.
b) 13.75 N.
c) 15.82 N.
d) 18.19 N.
e) 20.92 N.
12)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
a) 34.19 N.
b) 39.32 N.
c) 45.21 N.
d) 52 N.
e) 59.79 N.
13)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
a) 74.4 N
b) 85.5 N
c) 98.4 N
d) 113.1 N
e) 130.1 N

14) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 51.9 kg person who is standing 1.26 meters from the center?

a) 6.1 newtons.
b) 7 newtons.
c) 8 newtons.
d) 9.2 newtons.
e) 10.6 newtons.

15) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.026
d) 0.03
e) 0.034

#### T2 X1

1) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) southwest
b) northeast
c) north
d) northwest
e) south

2) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

a) 21.31 N.
b) 24.5 N.
c) 28.18 N.
d) 32.4 N.
e) 37.26 N.

3) If you toss a coin into the air, the velocity on the way down is

a) zero
b) up
c) down
4)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
a) 6.27 N.
b) 7.22 N.
c) 8.3 N.
d) 9.54 N.
e) 10.97 N.

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) northwest
c) north
d) south
e) southeast

6) A car is traveling west and slowing down. The acceleration is

a) to the east
b) zero
c) to the west
7)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
a) 29.52 N.
b) 33.95 N.
c) 39.04 N.
d) 44.9 N.
e) 51.63 N.

8) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) zero
c) down

9) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

a) 32.4 newtons.
b) 37.2 newtons.
c) 42.8 newtons.
d) 49.2 newtons.
e) 56.6 newtons.

10) A mass with weight (mg) of 49 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 54 degrees. What is the tension in the string?

a) 27.5 N.
b) 31.6 N.
c) 36.4 N.
d) 41.8 N.
e) 48.1 N.

11) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

a) 16.81 N.
b) 19.33 N.
c) 22.23 N.
d) 25.57 N.
e) 29.4 N.

12) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 77.6 kg person to stand1.59 meters from the center, without grabbing something?

a) 0.008
b) 0.009
c) 0.011
d) 0.012
e) 0.014

13) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) north
c) northwest
d) northeast
e) southeast
15)
In the figure shown, the mass of m1 is 6.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 101 N, what is the tension in the connecting string? Assume no friction is present.
a) 55.6 N
b) 64 N
c) 73.6 N
d) 84.6 N
e) 97.3 N

#### T2 X2

1) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) southeast
c) northeast
d) northwest
e) north
2)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
a) 32.66 N.
b) 37.56 N.
c) 43.2 N.
d) 49.68 N.
e) 57.13 N.

3) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

a) 32.4 newtons.
b) 37.2 newtons.
c) 42.8 newtons.
d) 49.2 newtons.
e) 56.6 newtons.

4) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

a) 16.81 N.
b) 19.33 N.
c) 22.23 N.
d) 25.57 N.
e) 29.4 N.
5)
In the figure shown, θ1 is 17 degrees , and θ3 is 29 degrees . The mass has a weight of 29 N. What is the tension, T1?
a) 20.16 N.
b) 23.18 N.
c) 26.66 N.
d) 30.66 N.
e) 35.26 N.

6) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) northwest
c) southwest
d) north
e) south

7) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southeast
c) north
d) south
e) northeast

8) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.026
d) 0.03
e) 0.034

9) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

10) If you toss a coin into the air, the velocity on the way down is

a) zero
b) down
c) up
11)
In the figure shown, the mass of m1 is 7 kg, and the mass of m2 is 3.6 kg. If the external force, Fext on m2 is 153 N, what is the tension in the connecting string? Assume no friction is present.
a) 66.4 N
b) 76.4 N
c) 87.9 N
d) 101 N
e) 116.2 N

12) A car is traveling west and slowing down. The acceleration is

a) to the west
b) to the east
c) zero

13) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

a) 11.4 N.
b) 13.1 N.
c) 15.1 N.
d) 17.4 N.
e) 20 N.

14) If you toss a coin into the air, the velocity while it as its highest point is

a) zero
b) up
c) down

15) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 36.72 N.
b) 42.23 N.
c) 48.56 N.
d) 55.85 N.
e) 64.23 N.

### T2 Y0

1) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) down
c) zero

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) northeast
c) southwest
d) northwest
e) north

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) north
c) southeast
d) northeast
e) south

4) A car is traveling west and slowing down. The acceleration is

a) to the east
b) zero
c) to the west

5) A car is traveling east and speeding up. The acceleration is

a) to the west
b) to the east
c) zero

6) If you toss a coin into the air, the acceleration on the way up is

a) zero
b) up
c) down

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) zero
b) north
c) west
d) east
e) south

8) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 59 degrees with respect to the horizontal. What is the tension in each string?

a) 21.3 N.
b) 24.5 N.
c) 28.2 N.
d) 32.4 N.
e) 37.3 N.

9) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

a) 23.15 N.
b) 26.62 N.
c) 30.62 N.
d) 35.21 N.
e) 40.49 N.

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

a) 10.99 N.
b) 12.64 N.
c) 14.54 N.
d) 16.72 N.
e) 19.22 N.
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
a) 13.3 N.
b) 15.3 N.
c) 17.59 N.
d) 20.23 N.
e) 23.27 N.
12)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
a) 21.2 N.
b) 25.4 N.
c) 30.5 N.
d) 36.6 N.
e) 43.9 N.

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.422
b) 0.465
c) 0.511
d) 0.562
e) 0.619

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

a) 0.006
b) 0.007
c) 0.008
d) 0.009
e) 0.01

15) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

a) 4.8 m/s2
b) 5.5 m/s2
c) 6.4 m/s2
d) 7.3 m/s2
e) 8.4 m/s2

#### T2 Y1

1) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.422
b) 0.465
c) 0.511
d) 0.562
e) 0.619

2) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

a) 8.3 m/s2
b) 9.5 m/s2
c) 11 m/s2
d) 12.6 m/s2
e) 14.5 m/s2

3) If you toss a coin into the air, the acceleration on the way up is

a) up
b) zero
c) down

4) A car is traveling east and speeding up. The acceleration is

a) to the east
b) zero
c) to the west

5) If you toss a coin into the air, the velocity while it as its highest point is

a) zero
b) down
c) up

6) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

a) 24.29 N.
b) 27.93 N.
c) 32.12 N.
d) 36.94 N.
e) 42.48 N.

7) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

a) 0.021
b) 0.024
c) 0.028
d) 0.032
e) 0.036
8)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
a) 32.5 N.
b) 39 N.
c) 46.8 N.
d) 56.2 N.
e) 67.4 N.

9) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

a) 27.4 N.
b) 31.5 N.
c) 36.2 N.
d) 41.7 N.
e) 47.9 N.

10) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.5N at an angle of 51 degress above the horizontal. What is the normal force?

a) 13.61 N.
b) 15.66 N.
c) 18 N.
d) 20.71 N.
e) 23.81 N.

11) A car is traveling west and slowing down. The acceleration is

a) to the east
b) zero
c) to the west
12)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
a) 11.96 N.
b) 13.75 N.
c) 15.82 N.
d) 18.19 N.
e) 20.92 N.

13) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) west
b) south
c) north
d) east
e) zero

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) southwest
c) northwest
d) northeast
e) north

15) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) south
c) northeast
d) north
e) southeast

#### T2 Y2

1) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

a) 10.99 N.
b) 12.64 N.
c) 14.54 N.
d) 16.72 N.
e) 19.22 N.

2) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) north
b) south
c) southeast
d) northwest
e) northeast

3) A car is traveling east and speeding up. The acceleration is

a) zero
b) to the west
c) to the east

4) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 59 degrees with respect to the horizontal. What is the tension in each string?

a) 21.3 N.
b) 24.5 N.
c) 28.2 N.
d) 32.4 N.
e) 37.3 N.
5)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the tension, T1?
a) 36.22 N.
b) 41.66 N.
c) 47.91 N.
d) 55.09 N.
e) 63.36 N.

6) If you toss a coin into the air, the acceleration on the way up is

a) down
b) up
c) zero

7) A car is traveling west and slowing down. The acceleration is

a) to the west
b) to the east
c) zero

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) southwest
c) south
d) north
e) northeast

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

a) 19.64 N.
b) 22.59 N.
c) 25.98 N.
d) 29.88 N.
e) 34.36 N.

10) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.026
d) 0.03
e) 0.034

11) If you toss a coin into the air, the velocity while it as its highest point is

a) up
b) down
c) zero

12) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

a) west
b) north
c) east
d) south
e) zero
13)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
a) 46.5 N.
b) 55.8 N.
c) 67 N.
d) 80.4 N.
e) 96.5 N.

14) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

a) 8.3 m/s2
b) 9.5 m/s2
c) 11 m/s2
d) 12.6 m/s2
e) 14.5 m/s2

15) Nine barefoot baseball players, with a total mass of 672 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.59 . The net mass of the (shoed) basketball team is 407 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.295
b) 0.325
c) 0.357
d) 0.393
e) 0.432

### T2 Z0

1) If you toss a coin into the air, the velocity on the way down is

a) up
b) zero
c) down

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) southwest
c) north
d) northwest
e) south

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) northeast
c) northeast
d) north
e) southeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) north
b) south
c) southwest
d) northwest
e) northeast

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southeast
b) northwest
c) south
d) north
e) northeast

6) A car is traveling west and slowing down. The acceleration is

a) to the west
b) to the east
c) zero

7) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

8) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

a) 6.4 m/s2.
b) 7.3 m/s2.
c) 8.4 m/s2.
d) 9.7 m/s2.
e) 11.1 m/s2.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

a) 53.7 degrees
b) 61.8 degrees
c) 71 degrees
d) 81.7 degrees
e) 93.9 degrees
11)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
a) 45.03 N.
b) 51.78 N.
c) 59.55 N.
d) 68.48 N.
e) 78.75 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
a) 29.52 N.
b) 33.95 N.
c) 39.04 N.
d) 44.9 N.
e) 51.63 N.

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.422
b) 0.465
c) 0.511
d) 0.562
e) 0.619

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.44 minutes.
b) 6.25 minutes.
c) 7.19 minutes.
d) 8.27 minutes.
e) 9.51 minutes.

15) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

a) 0.03
b) 0.034
c) 0.039
d) 0.045
e) 0.052

#### T2 Z1

1)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
a) 60.54 N.
b) 69.62 N.
c) 80.06 N.
d) 92.07 N.
e) 105.88 N.

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) northeast
b) northwest
c) southeast
d) northeast
e) north
3)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
a) 22.7 N.
b) 26.11 N.
c) 30.02 N.
d) 34.53 N.
e) 39.71 N.

4) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.

5) A car is traveling east and slowing down. The acceleration is

a) zero
b) to the east
c) to the west

6) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

a) 0.019
b) 0.022
c) 0.025
d) 0.029
e) 0.033

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.93 minutes.
b) 6.82 minutes.
c) 7.84 minutes.
d) 9.02 minutes.
e) 10.37 minutes.

8) Nine barefoot baseball players, with a total mass of 664 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.53 . The net mass of the (shoed) basketball team is 418 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.334
b) 0.367
c) 0.404
d) 0.444
e) 0.488

9) A 3.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.29 . In addition to the surface friction, there is also an air drag equal to 21 N. What is the magnitude (absolute value) of the acceleration?

a) 8.2 m/s2.
b) 9.4 m/s2.
c) 10.8 m/s2.
d) 12.4 m/s2.
e) 14.3 m/s2.

10) A car is traveling west and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

11) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) south
b) southwest
c) northeast
d) northwest
e) north

12) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) southeast
b) north
c) northeast
d) northwest
e) south

13) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) south
b) northeast
c) southwest
d) northwest
e) north

15) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

a) 36.3 degrees
b) 41.7 degrees
c) 47.9 degrees
d) 55.1 degrees
e) 63.4 degrees

#### T2 Z2

1) A car is traveling east and slowing down. The acceleration is

a) to the east
b) to the west
c) zero

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

a) 5.44 minutes.
b) 6.25 minutes.
c) 7.19 minutes.
d) 8.27 minutes.
e) 9.51 minutes.

3) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

a) 0.447
b) 0.492
c) 0.541
d) 0.595
e) 0.655

4) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

a) 34.6 degrees
b) 39.8 degrees
c) 45.8 degrees
d) 52.7 degrees
e) 60.6 degrees

5) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

a) 24.94 N.
b) 28.68 N.
c) 32.98 N.
d) 37.93 N.
e) 43.62 N.
6)
In the figure shown, θ1 is 20 degrees , and θ3 is 33 degrees . The mass has a weight of 31 N. What is the tension, T1?
a) 32.55 N.
b) 37.44 N.
c) 43.05 N.
d) 49.51 N.
e) 56.94 N.

7) A 2.3 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 16 N. What is the magnitude (absolute value) of the acceleration?

a) 7.2 m/s2.
b) 8.3 m/s2.
c) 9.5 m/s2.
d) 11 m/s2.
e) 12.6 m/s2.

8) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

a) northeast
b) north
c) southwest
d) south
e) northwest

9) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

a) northwest
b) north
c) southwest
d) northeast
e) south

10) If you toss a coin into the air, the velocity on the way down is

a) down
b) zero
c) up
11)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
a) 30.78 N.
b) 35.4 N.
c) 40.71 N.
d) 46.82 N.
e) 53.84 N.

12) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

a) northwest
b) southeast
c) north
d) south
e) northeast

13) A car is traveling west and slowing down. The acceleration is

a) zero
b) to the west
c) to the east

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

a) north
b) northwest
c) northeast
d) northeast
e) southeast

15) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

a) 0.008
b) 0.009
c) 0.01
d) 0.012
e) 0.014
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### Key: A0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
-b) objects don't begin to accelerate until after the force has been applied
+c) the cloth is accelerating for such a brief time that there is little motion

2) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
+b) southwest
-c) southeast
-d) south
-e) west

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) northeast
-c) northwest
-d) south
+e) southeast

4) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) to the west
-c) zero

5) A car is traveling east and slowing down. The acceleration is

-a) to the east
-b) zero
+c) to the west

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) east
-b) south
+c) west
-d) north
-e) zero

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) zero
-b) west
-c) south
-d) north
+e) east

8) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

-a) 61.1 N.
+b) 70.3 N.
-c) 80.8 N.
-d) 92.9 N.
-e) 106.9 N.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
-a) 13.3 N.
-b) 15.3 N.
-c) 17.59 N.
-d) 20.23 N.
+e) 23.27 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
-a) 34.8 N.
+b) 41.8 N.
-c) 50.2 N.
-d) 60.2 N.
-e) 72.3 N.
13)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 3.9 kg. If the external force, Fext on m2 is 136 N, what is the tension in the connecting string? Assume no friction is present.
+a) 79 N
-b) 90.8 N
-c) 104.4 N
-d) 120.1 N
-e) 138.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.

15) What is the gravitational acceleration on a plant that is 2.98 times more dense than Earth, and a radius that is 1.81 times greater than Earth's?

-a) 30.2 m/s2
-b) 34.8 m/s2
-c) 40 m/s2
-d) 46 m/s2
+e) 52.9 m/s2

#### Key: A1

1)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
-a) 10.01 N.
-b) 11.51 N.
-c) 13.23 N.
-d) 15.22 N.
+e) 17.5 N.

2) What is the gravitational acceleration on a plant that is 1.23 times more dense than Earth, and a radius that is 1.83 times greater than Earth's?

-a) 19.2 m/s2
+b) 22.1 m/s2
-c) 25.4 m/s2
-d) 29.2 m/s2
-e) 33.5 m/s2

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northeast
-c) northwest
-d) north
+e) southeast

4) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) east
-b) north
-c) south
+d) west
-e) zero

5) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) southeast
+c) southwest
-d) south
-e) west

6) A mass with weight (mg) equal to 37 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 65 degrees with respect to the horizontal. What is the tension in each string?

-a) 15.4 N.
-b) 17.7 N.
+c) 20.4 N.
-d) 23.5 N.
-e) 27 N.

7) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

+a) 2.6 s
-b) 2.99 s
-c) 3.43 s
-d) 3.95 s
-e) 4.54 s

8) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly

9) A car is traveling east and slowing down. The acceleration is

-a) zero
-b) to the east
+c) to the west

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

-a) 17.21 N.
-b) 19.79 N.
-c) 22.76 N.
+d) 26.17 N.
-e) 30.1 N.
11)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
+a) 32.5 N.
-b) 39 N.
-c) 46.8 N.
-d) 56.2 N.
-e) 67.4 N.
12)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 3.9 kg. If the external force, Fext on m2 is 136 N, what is the tension in the connecting string? Assume no friction is present.
+a) 79 N
-b) 90.8 N
-c) 104.4 N
-d) 120.1 N
-e) 138.1 N

13) A car is traveling west and slowing down. The acceleration is

-a) to the west
+b) to the east
-c) zero

14) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) west
-b) south
+c) east
-d) north
-e) zero

15) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.44 minutes.
-b) 6.25 minutes.
+c) 7.19 minutes.
-d) 8.27 minutes.
-e) 9.51 minutes.

#### Key: A2

1) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) west
-b) northwest
+c) southwest
-d) south
-e) southeast

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.198 rad/sec. How many minutes does it take to complete 10.5 revolutions?

-a) 4.83 minutes.
+b) 5.55 minutes.
-c) 6.39 minutes.
-d) 7.34 minutes.
-e) 8.45 minutes.
3)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T1?
+a) 79.1 N.
-b) 95 N.
-c) 114 N.
-d) 136.8 N.
-e) 164.1 N.

4) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

+a) 20.5 m/s2
-b) 23.5 m/s2
-c) 27.1 m/s2
-d) 31.1 m/s2
-e) 35.8 m/s2
5)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
-a) 26.66 N.
-b) 30.66 N.
-c) 35.25 N.
+d) 40.54 N.
-e) 46.62 N.

6) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

+a) 2.6 s
-b) 2.99 s
-c) 3.43 s
-d) 3.95 s
-e) 4.54 s

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) zero
-b) west
-c) south
-d) north
+e) east

8) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

-a) 27.4 N.
-b) 31.5 N.
-c) 36.2 N.
-d) 41.7 N.
+e) 47.9 N.

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly

10) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) zero
-b) south
-c) north
+d) west
-e) east

11) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

-a) 24.29 N.
-b) 27.93 N.
+c) 32.12 N.
-d) 36.94 N.
-e) 42.48 N.
12)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 3.9 kg. If the external force, Fext on m2 is 136 N, what is the tension in the connecting string? Assume no friction is present.
+a) 79 N
-b) 90.8 N
-c) 104.4 N
-d) 120.1 N
-e) 138.1 N

13) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) north
-c) northeast
-d) northwest
+e) southeast

14) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

15) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) zero
-c) to the west

### Key: B0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
-b) the cloth is more slippery when it is pulled quickly
+c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

3) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

4) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
+b) zero
-c) down

5) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) northwest
-b) northeast
-c) north
-d) south
-e) southwest

6) A car is traveling east and slowing down. The acceleration is

+a) to the west
-b) zero
-c) to the east

7) If you toss a coin into the air, the acceleration on the way down is

-a) up
+b) down
-c) zero

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

-a) 12.8 N.
-b) 14.8 N.
-c) 17 N.
+d) 19.5 N.
-e) 22.5 N.

9) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

-a) 1.05 s
+b) 1.21 s
-c) 1.39 s
-d) 1.6 s
-e) 1.84 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 48.4 degrees
-b) 55.7 degrees
+c) 64 degrees
-d) 73.6 degrees
-e) 84.7 degrees

11) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

+a) 18.6 N.
-b) 21.4 N.
-c) 24.6 N.
-d) 28.3 N.
-e) 32.6 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
-a) 39.08 N.
-b) 44.94 N.
+c) 51.69 N.
-d) 59.44 N.
-e) 68.35 N.

13) Nine barefoot baseball players, with a total mass of 664 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.53 . The net mass of the (shoed) basketball team is 418 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.334
-b) 0.367
-c) 0.404
-d) 0.444
-e) 0.488

14) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

-a) 7.7 newtons.
-b) 8.8 newtons.
-c) 10.2 newtons.
+d) 11.7 newtons.
-e) 13.4 newtons.

15) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

-a) 0.019
+b) 0.022
-c) 0.026
-d) 0.03
-e) 0.034

#### Key: B1

1) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

2) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

+a) 9.4 newtons.
-b) 10.8 newtons.
-c) 12.4 newtons.
-d) 14.3 newtons.
-e) 16.4 newtons.

3) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

-a) 53.7 degrees
-b) 61.8 degrees
+c) 71 degrees
-d) 81.7 degrees
-e) 93.9 degrees

4) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.447
-b) 0.492
-c) 0.541
-d) 0.595
-e) 0.655

5) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

-a) 1.87 s
+b) 2.15 s
-c) 2.47 s
-d) 2.85 s
-e) 3.27 s

6) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

-a) 12.8 N.
-b) 14.8 N.
-c) 17 N.
+d) 19.5 N.
-e) 22.5 N.

7) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) south
-c) north
-d) southwest
+e) northwest

8) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) up
-c) zero
9)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
-a) 20.1 N.
-b) 23.1 N.
-c) 26.6 N.
-d) 30.6 N.
+e) 35.2 N.

10) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

-a) 0.017
-b) 0.02
-c) 0.023
-d) 0.026
+e) 0.03

11) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
+b) down
-c) zero

12) A car is traveling east and slowing down. The acceleration is

-a) zero
-b) to the east
+c) to the west

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
+b) the cloth is accelerating for such a brief time that there is little motion
-c) objects don't begin to accelerate until after the force has been applied

14) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
-b) down
+c) zero
15)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
-a) 55.74 N.
-b) 64.1 N.
-c) 73.72 N.
+d) 84.77 N.
-e) 97.49 N.

#### Key: B2

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
-b) objects don't begin to accelerate until after the force has been applied
+c) the cloth is accelerating for such a brief time that there is little motion
2)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
-a) 20.1 N.
-b) 23.1 N.
-c) 26.6 N.
-d) 30.6 N.
+e) 35.2 N.

3) A mass with weight (mg) of 27 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

-a) 12.5 N.
-b) 14.3 N.
+c) 16.5 N.
-d) 19 N.
-e) 21.8 N.

4) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

5) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

6) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

-a) 36.3 degrees
-b) 41.7 degrees
-c) 47.9 degrees
-d) 55.1 degrees
+e) 63.4 degrees

7) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.422
+b) 0.465
-c) 0.511
-d) 0.562
-e) 0.619

8) A car is traveling east and slowing down. The acceleration is

+a) to the west
-b) zero
-c) to the east

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 1.27 s
-b) 1.46 s
+c) 1.68 s
-d) 1.93 s
-e) 2.22 s
10)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
-a) 55.74 N.
-b) 64.1 N.
-c) 73.72 N.
+d) 84.77 N.
-e) 97.49 N.

11) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) up
-c) zero

12) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

+a) 9.4 newtons.
-b) 10.8 newtons.
-c) 12.4 newtons.
-d) 14.3 newtons.
-e) 16.4 newtons.

13) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) south
-c) southwest
-d) north
+e) northwest

14) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
+b) zero
-c) down

15) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

+a) 0.021
-b) 0.024
-c) 0.028
-d) 0.032
-e) 0.036

### Key: C0

1) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
-b) up
+c) down

2) If you toss a coin into the air, the velocity on the way down is

-a) up
+b) down
-c) zero

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) north
+b) northwest
-c) south
-d) northeast
-e) southwest

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) southeast
-b) northwest
-c) northeast
-d) northeast
+e) north

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) north
-c) south
-d) northwest
+e) southeast

6) A car is traveling west and slowing down. The acceleration is

-a) zero
-b) to the west
+c) to the east

7) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

8) A mass with weight (mg) equal to 41 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 30 degrees with respect to the horizontal. What is the tension in each string?

-a) 23.4 N.
-b) 27 N.
-c) 31 N.
-d) 35.7 N.
+e) 41 N.

9) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

-a) 1.05 s
+b) 1.21 s
-c) 1.39 s
-d) 1.6 s
-e) 1.84 s

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
-a) 13.3 N.
-b) 15.3 N.
-c) 17.59 N.
-d) 20.23 N.
+e) 23.27 N.
12)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
+a) 32.5 N.
-b) 39 N.
-c) 46.8 N.
-d) 56.2 N.
-e) 67.4 N.
13)
In the figure shown (with m1 = 5.4 kg, m2 = 2.3 kg, and Fext = 138 N), what is the acceleration? Assume no friction is present.
-a) 10.2 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
+e) 17.9 m/s2

14) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

-a) 4.1 m/s2
-b) 4.7 m/s2
-c) 5.4 m/s2
-d) 6.2 m/s2
+e) 7.2 m/s2

15) What is the gravitational acceleration on a plant that is 2.01 times more dense than Earth, and a radius that is 1.54 times greater than Earth's?

-a) 26.4 m/s2
+b) 30.3 m/s2
-c) 34.9 m/s2
-d) 40.1 m/s2
-e) 46.1 m/s2

#### Key: C1

1)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
+a) 32.5 N.
-b) 39 N.
-c) 46.8 N.
-d) 56.2 N.
-e) 67.4 N.

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) northwest
-c) southwest
-d) north
-e) northeast

3) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) up
-c) zero

4) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s

5) A car is traveling west and slowing down. The acceleration is

-a) to the west
-b) zero
+c) to the east
6)
In the figure shown (with m1 = 5.4 kg, m2 = 2.3 kg, and Fext = 138 N), what is the acceleration? Assume no friction is present.
-a) 10.2 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
+e) 17.9 m/s2

7) If you toss a coin into the air, the velocity on the way down is

-a) zero
+b) down
-c) up

8) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

-a) 36.3 degrees
-b) 41.7 degrees
-c) 47.9 degrees
-d) 55.1 degrees
+e) 63.4 degrees
9)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
-a) 26.66 N.
-b) 30.66 N.
-c) 35.25 N.
+d) 40.54 N.
-e) 46.62 N.

10) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) southeast
-c) north
-d) northeast
-e) northwest

11) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) up
-c) zero

12) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
-b) southeast
+c) north
-d) northwest
-e) northeast

13) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

-a) 4.7 m/s2
-b) 5.4 m/s2
-c) 6.2 m/s2
-d) 7.2 m/s2
+e) 8.3 m/s2

14) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

-a) 61.1 N.
+b) 70.3 N.
-c) 80.8 N.
-d) 92.9 N.
-e) 106.9 N.

15) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

+a) 20.5 m/s2
-b) 23.5 m/s2
-c) 27.1 m/s2
-d) 31.1 m/s2
-e) 35.8 m/s2

#### Key: C2

1) A mass with weight (mg) equal to 21 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 66 degrees with respect to the horizontal. What is the tension in each string?

-a) 6.6 N.
-b) 7.6 N.
-c) 8.7 N.
-d) 10 N.
+e) 11.5 N.
2)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
-a) 46.5 N.
+b) 55.8 N.
-c) 67 N.
-d) 80.4 N.
-e) 96.5 N.

3) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
-b) zero
+c) down

4) If you toss a coin into the air, the acceleration on the way down is

-a) up
-b) zero
+c) down

5) If you toss a coin into the air, the velocity on the way down is

-a) zero
+b) down
-c) up

6) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) north
-c) south
-d) northeast
+e) southeast

7) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) south
-c) north
+d) northwest
-e) southwest

8) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s

9) What is the gravitational acceleration on a plant that is 1.23 times more dense than Earth, and a radius that is 1.83 times greater than Earth's?

-a) 19.2 m/s2
+b) 22.1 m/s2
-c) 25.4 m/s2
-d) 29.2 m/s2
-e) 33.5 m/s2

10) A car is traveling west and slowing down. The acceleration is

-a) to the west
-b) zero
+c) to the east

11) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

+a) 10.3 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
-e) 18 m/s2

12) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees
13)
In the figure shown (with m1 = 6.4 kg, m2 = 3.7 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
+a) 13.4 m/s2
-b) 15.4 m/s2
-c) 17.7 m/s2
-d) 20.3 m/s2
-e) 23.4 m/s2
14)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the tension, T1?
-a) 36.22 N.
+b) 41.66 N.
-c) 47.91 N.
-d) 55.09 N.
-e) 63.36 N.

15) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) northeast
-c) northwest
-d) northeast
-e) southeast

### Key: D0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
+b) northeast
-c) southwest
-d) south
-e) north

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) southeast
+b) north
-c) northwest
-d) northeast
-e) northeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) south
-c) southwest
-d) northwest
-e) northeast

5) A car is traveling east and speeding up. The acceleration is

-a) to the west
-b) zero
+c) to the east

6) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

7) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

8) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.52
+b) 0.63
-c) 0.76
-d) 0.91
-e) 1.09

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 1.27 s
-b) 1.46 s
+c) 1.68 s
-d) 1.93 s
-e) 2.22 s

10) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

-a) 36.3 degrees
-b) 41.7 degrees
-c) 47.9 degrees
-d) 55.1 degrees
+e) 63.4 degrees

11) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

-a) 23.7 N.
-b) 27.3 N.
+c) 31.4 N.
-d) 36.1 N.
-e) 41.5 N.
12)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T1?
-a) 30.9 N.
-b) 37.1 N.
-c) 44.5 N.
+d) 53.5 N.
-e) 64.1 N.

13) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.3 . But the team wins a game of tug of war due to their superior mass of 662 kg. They are playing against a 5 person basketball team with a net mass of 430 kg. What is the maximum coefficient of static friction of the basketball team?

-a) 0.42
+b) 0.462
-c) 0.508
-d) 0.559
-e) 0.615

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.41 minutes.
+b) 6.22 minutes.
-c) 7.15 minutes.
-d) 8.22 minutes.
-e) 9.46 minutes.

15) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

+a) 0.019
-b) 0.022
-c) 0.025
-d) 0.029
-e) 0.033

#### Key: D1

1) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down

2) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

-a) 1.4 s
-b) 1.61 s
+c) 1.86 s
-d) 2.13 s
-e) 2.45 s

3) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

+a) 18.6 N.
-b) 21.4 N.
-c) 24.6 N.
-d) 28.3 N.
-e) 32.6 N.

4) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.5 m/s2?

+a) 70.3 degrees
-b) 80.9 degrees
-c) 93 degrees
-d) 106.9 degrees
-e) 123 degrees

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) northeast
-c) north
-d) northwest
-e) southwest

6) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

-a) 0.03
-b) 0.034
-c) 0.039
+d) 0.045
-e) 0.052

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.188 rad/sec. How many minutes does it take to complete 6.5 revolutions?

-a) 2.74 minutes.
-b) 3.15 minutes.
+c) 3.62 minutes.
-d) 4.16 minutes.
-e) 4.79 minutes.

8) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.35 . But the team wins a game of tug of war due to their superior mass of 614 kg. They are playing against a 5 person basketball team with a net mass of 405 kg. What is the maximum coefficient of static friction of the basketball team?

-a) 0.439
-b) 0.482
+c) 0.531
-d) 0.584
-e) 0.642

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
+b) the cloth is accelerating for such a brief time that there is little motion
-c) the cloth is more slippery when it is pulled quickly
10)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
-a) 46.5 N.
+b) 55.8 N.
-c) 67 N.
-d) 80.4 N.
-e) 96.5 N.

11) A car is traveling east and speeding up. The acceleration is

-a) to the west
+b) to the east
-c) zero

12) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

13) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) northeast
-c) southeast
-d) northeast
+e) north

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
-b) northeast
-c) southwest
+d) north
-e) northwest

15) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

+a) 0.7
-b) 0.84
-c) 1.01
-d) 1.21
-e) 1.45

#### Key: D2

1) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.1
-b) 0.12
-c) 0.14
-d) 0.17
+e) 0.2

2) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero
3)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.

4) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down
5)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
-a) 20.1 N.
-b) 23.1 N.
-c) 26.6 N.
-d) 30.6 N.
+e) 35.2 N.

6) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.23 . But the team wins a game of tug of war due to their superior mass of 675 kg. They are playing against a 5 person basketball team with a net mass of 394 kg. What is the maximum coefficient of static friction of the basketball team?

+a) 0.394
-b) 0.433
-c) 0.477
-d) 0.524
-e) 0.577

7) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

-a) 1.4 s
-b) 1.61 s
+c) 1.86 s
-d) 2.13 s
-e) 2.45 s

8) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

10) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) southwest
-b) northwest
+c) north
-d) northeast
-e) south

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) northeast
-b) southwest
-c) northwest
-d) south
-e) north

12) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

-a) 0.03
-b) 0.034
-c) 0.039
+d) 0.045
-e) 0.052

13) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

-a) 3.05 minutes.
-b) 3.51 minutes.
-c) 4.03 minutes.
+d) 4.64 minutes.
-e) 5.33 minutes.

14) A car is traveling east and speeding up. The acceleration is

+a) to the east
-b) to the west
-c) zero

15) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) northwest
-c) northeast
-d) northeast
-e) southeast

### Key: E0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the velocity on the way up is

-a) down
+b) up
-c) zero

3) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

4) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
+b) zero
-c) down

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) south
+c) northeast
-d) southwest
-e) northwest

6) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) zero
-c) up

7) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) opposite the direction of the Moon's velocity
-c) away from Earth
-d) in the same direction as the Moon's velocity
-e) zero

8) A 2.5 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 11 N. What is the magnitude (absolute value) of the acceleration?

-a) 7.3 m/s2.
+b) 8.4 m/s2.
-c) 9.7 m/s2.
-d) 11.1 m/s2.
-e) 12.8 m/s2.

9) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

-a) 10.99 N.
-b) 12.64 N.
-c) 14.54 N.
+d) 16.72 N.
-e) 19.22 N.

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
-a) 13.3 N.
-b) 15.3 N.
-c) 17.59 N.
-d) 20.23 N.
+e) 23.27 N.
12)
In the figure shown, θ1 is 17 degrees , and θ3 is 39 degrees . The mass has a weight of 42 N. What is the tension, T1?
-a) 34.24 N.
+b) 39.37 N.
-c) 45.28 N.
-d) 52.07 N.
-e) 59.88 N.
13)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
-a) 82 N
-b) 94.3 N
+c) 108.5 N
-d) 124.8 N
-e) 143.5 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

-a) 3.05 minutes.
-b) 3.51 minutes.
-c) 4.03 minutes.
+d) 4.64 minutes.
-e) 5.33 minutes.

15) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

+a) 9.4 newtons.
-b) 10.8 newtons.
-c) 12.4 newtons.
-d) 14.3 newtons.
-e) 16.4 newtons.

#### Key: E1

1) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

-a) 3.05 minutes.
-b) 3.51 minutes.
-c) 4.03 minutes.
+d) 4.64 minutes.
-e) 5.33 minutes.

2) A 2.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.59 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.9 m/s2.
-b) 8 m/s2.
-c) 9.2 m/s2.
-d) 10.6 m/s2.
+e) 12.1 m/s2.

3) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) zero
-c) up

4) As the Moon circles Earth, the acceleration of the Moon is

-a) zero
+b) towards Earth
-c) opposite the direction of the Moon's velocity
-d) in the same direction as the Moon's velocity
-e) away from Earth

5) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
-b) down
+c) zero
6)
In the figure shown, θ1 is 17 degrees , and θ3 is 39 degrees . The mass has a weight of 42 N. What is the tension, T1?
-a) 34.24 N.
+b) 39.37 N.
-c) 45.28 N.
-d) 52.07 N.
-e) 59.88 N.
7)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
-a) 31.26 N.
-b) 35.95 N.
+c) 41.34 N.
-d) 47.54 N.
-e) 54.68 N.

8) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

+a) 2.6 s
-b) 2.99 s
-c) 3.43 s
-d) 3.95 s
-e) 4.54 s

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
+b) the cloth is accelerating for such a brief time that there is little motion
-c) objects don't begin to accelerate until after the force has been applied

10) If you toss a coin into the air, the velocity on the way up is

-a) down
+b) up
-c) zero
11)
In the figure shown, the mass of m1 is 6 kg, and the mass of m2 is 3.2 kg. If the external force, Fext on m2 is 173 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.31, and that for m2 the coefficient is 0.44 .
+a) 110.2 N
-b) 126.7 N
-c) 145.7 N
-d) 167.6 N
-e) 192.7 N

12) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

+a) 9.4 newtons.
-b) 10.8 newtons.
-c) 12.4 newtons.
-d) 14.3 newtons.
-e) 16.4 newtons.

13) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.5N at an angle of 51 degress above the horizontal. What is the normal force?

-a) 13.61 N.
-b) 15.66 N.
-c) 18 N.
-d) 20.71 N.
+e) 23.81 N.

14) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) up
-c) zero

15) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) southwest
+c) northeast
-d) north
-e) northwest

#### Key: E2

1) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.4 m/s2.
-b) 7.3 m/s2.
-c) 8.4 m/s2.
-d) 9.7 m/s2.
+e) 11.1 m/s2.
2)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
+a) 32.66 N.
-b) 37.56 N.
-c) 43.2 N.
-d) 49.68 N.
-e) 57.13 N.
3)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
-a) 22.7 N.
-b) 26.11 N.
-c) 30.02 N.
-d) 34.53 N.
+e) 39.71 N.

4) If you toss a coin into the air, the acceleration on the way up is

-a) zero
+b) down
-c) up
5)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 2.9 kg. If the external force, Fext on m2 is 132 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.37, and that for m2 the coefficient is 0.48 .
+a) 89.1 N
-b) 102.5 N
-c) 117.9 N
-d) 135.5 N
-e) 155.9 N

6) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.15 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.77 minutes.
+b) 6.63 minutes.
-c) 7.63 minutes.
-d) 8.77 minutes.
-e) 10.09 minutes.

7) If you toss a coin into the air, the velocity on the way down is

-a) zero
-b) up
+c) down

8) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 0.68 s
-b) 0.78 s
-c) 0.9 s
-d) 1.03 s
+e) 1.19 s

9) If you toss a coin into the air, the velocity on the way up is

-a) down
+b) up
-c) zero

10) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

-a) 8.6 newtons.
-b) 9.9 newtons.
-c) 11.4 newtons.
-d) 13.1 newtons.
+e) 15.1 newtons.

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) north
-c) south
-d) northwest
+e) northeast

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

13) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
-b) zero
+c) towards Earth
-d) opposite the direction of the Moon's velocity
-e) away from Earth

14) A sled of mass 5.2 kg is at rest on a rough surface. A string pulls with a tension of 45.3N at an angle of 59 degress above the horizontal. What is the normal force?

-a) 10.55 N.
+b) 12.13 N.
-c) 13.95 N.
-d) 16.04 N.
-e) 18.45 N.

15) If you toss a coin into the air, the velocity while it as its highest point is

+a) zero
-b) up
-c) down

### Key: F0

1) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

2) If you toss a coin into the air, the velocity on the way up is

-a) zero
+b) up
-c) down

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) southwest
-c) northwest
-d) south
+e) northeast

4) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) south
-c) northwest
-d) north
+e) southeast

5) A car is traveling east and slowing down. The acceleration is

+a) to the west
-b) zero
-c) to the east

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) south
-b) zero
-c) west
+d) east
-e) north

7) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

8) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

+a) 0.7
-b) 0.84
-c) 1.01
-d) 1.21
-e) 1.45

9) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

-a) 24.29 N.
-b) 27.93 N.
+c) 32.12 N.
-d) 36.94 N.
-e) 42.48 N.

10) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

+a) 2.6 s
-b) 2.99 s
-c) 3.43 s
-d) 3.95 s
-e) 4.54 s
11)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
-a) 22.7 N.
-b) 26.11 N.
-c) 30.02 N.
-d) 34.53 N.
+e) 39.71 N.
13)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
-a) 6.3 m/s2
-b) 7.2 m/s2
-c) 8.3 m/s2
-d) 9.5 m/s2
+e) 11 m/s2

14) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

+a) 16.3 newtons.
-b) 18.8 newtons.
-c) 21.6 newtons.
-d) 24.8 newtons.
-e) 28.5 newtons.

15) What is the gravitational acceleration on a plant that is 1.34 times more massive than Earth, and a radius that is 1.88 times greater than Earths?

-a) 2.4 m/s2
-b) 2.8 m/s2
-c) 3.2 m/s2
+d) 3.7 m/s2
-e) 4.3 m/s2

#### Key: F1

1) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s

2) A car is traveling east and slowing down. The acceleration is

-a) zero
-b) to the east
+c) to the west
3)
In the figure shown (with m1 = 5.4 kg, m2 = 2.3 kg, and Fext = 138 N), what is the acceleration? Assume no friction is present.
-a) 10.2 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
+e) 17.9 m/s2

4) If you toss a coin into the air, the velocity on the way up is

-a) zero
-b) down
+c) up

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) southwest
+c) northeast
-d) south
-e) north

6) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

-a) 4.8 m/s2
-b) 5.5 m/s2
-c) 6.4 m/s2
+d) 7.3 m/s2
-e) 8.4 m/s2

7) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

-a) 21.31 N.
-b) 24.5 N.
-c) 28.18 N.
+d) 32.4 N.
-e) 37.26 N.

8) If you toss a coin into the air, the acceleration on the way down is

-a) up
+b) down
-c) zero
9)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
-a) 34.19 N.
-b) 39.32 N.
-c) 45.21 N.
-d) 52 N.
+e) 59.79 N.

10) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

11) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

+a) 9.4 newtons.
-b) 10.8 newtons.
-c) 12.4 newtons.
-d) 14.3 newtons.
-e) 16.4 newtons.

12) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

+a) east
-b) zero
-c) west
-d) south
-e) north

13) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.44
+b) 0.53
-c) 0.64
-d) 0.76
-e) 0.92

14) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) northwest
+c) southeast
-d) south
-e) north
15)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T1?
-a) 30.9 N.
-b) 37.1 N.
-c) 44.5 N.
+d) 53.5 N.
-e) 64.1 N.

#### Key: F2

1)
In the figure shown (with m1 = 5.4 kg, m2 = 3.9 kg, and Fext = 136 N), what is the acceleration? Assume no friction is present.
-a) 12.7 m/s2
+b) 14.6 m/s2
-c) 16.8 m/s2
-d) 19.3 m/s2
-e) 22.2 m/s2

2) A car is traveling east and slowing down. The acceleration is

-a) to the east
-b) zero
+c) to the west

3) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) south
-b) north
-c) west
+d) east
-e) zero

4) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down

5) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.52
+b) 0.63
-c) 0.76
-d) 0.91
-e) 1.09

6) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 0.68 s
-b) 0.78 s
-c) 0.9 s
-d) 1.03 s
+e) 1.19 s

7) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

-a) 24.29 N.
-b) 27.93 N.
+c) 32.12 N.
-d) 36.94 N.
-e) 42.48 N.

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) northeast
-b) north
-c) south
-d) southwest
-e) northwest

9) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) zero
-c) down
10)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
-a) 46.5 N.
+b) 55.8 N.
-c) 67 N.
-d) 80.4 N.
-e) 96.5 N.
11)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
-a) 29.52 N.
-b) 33.95 N.
+c) 39.04 N.
-d) 44.9 N.
-e) 51.63 N.

12) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

+a) 16.3 newtons.
-b) 18.8 newtons.
-c) 21.6 newtons.
-d) 24.8 newtons.
-e) 28.5 newtons.

13) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) north
+c) southeast
-d) northeast
-e) northwest

14) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
+b) down
-c) zero

15) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

-a) 4.8 m/s2
-b) 5.5 m/s2
-c) 6.4 m/s2
+d) 7.3 m/s2
-e) 8.4 m/s2

### Key: G0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
-b) objects don't begin to accelerate until after the force has been applied
+c) the cloth is accelerating for such a brief time that there is little motion

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) northwest
-c) north
-d) northeast
-e) southwest

3) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) southwest
-b) southeast
-c) south
-d) northwest
-e) west

4) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) northwest
+c) southeast
-d) south
-e) northeast

5) A car is traveling east and slowing down. The acceleration is

-a) zero
+b) to the west
-c) to the east

6) A car is traveling east and speeding up. The acceleration is

-a) to the west
+b) to the east
-c) zero

7) If you toss a coin into the air, the acceleration on the way down is

-a) up
+b) down
-c) zero

8) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

+a) 0.7
-b) 0.84
-c) 1.01
-d) 1.21
-e) 1.45

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

10) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 1.27 s
-b) 1.46 s
+c) 1.68 s
-d) 1.93 s
-e) 2.22 s
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
-a) 13.3 N.
-b) 15.3 N.
-c) 17.59 N.
-d) 20.23 N.
+e) 23.27 N.
12)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
-a) 34.19 N.
-b) 39.32 N.
-c) 45.21 N.
-d) 52 N.
+e) 59.79 N.
13)
In the figure shown (with m1 = 5.1 kg, m2 = 3.5 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
-a) 13.7 m/s2
+b) 15.7 m/s2
-c) 18.1 m/s2
-d) 20.8 m/s2
-e) 23.9 m/s2

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.168 rad/sec. How many minutes does it take to complete 6.5 revolutions?

-a) 2.66 minutes.
-b) 3.06 minutes.
-c) 3.52 minutes.
+d) 4.05 minutes.
-e) 4.66 minutes.

15) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

+a) 10.3 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
-e) 18 m/s2

#### Key: G1

1)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
-a) 29.52 N.
-b) 33.95 N.
+c) 39.04 N.
-d) 44.9 N.
-e) 51.63 N.

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.41 minutes.
+b) 6.22 minutes.
-c) 7.15 minutes.
-d) 8.22 minutes.
-e) 9.46 minutes.
3)
In the figure shown (with m1 = 5.4 kg, m2 = 3.9 kg, and Fext = 136 N), what is the acceleration? Assume no friction is present.
-a) 12.7 m/s2
+b) 14.6 m/s2
-c) 16.8 m/s2
-d) 19.3 m/s2
-e) 22.2 m/s2

4) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

-a) 4.7 m/s2
-b) 5.4 m/s2
-c) 6.2 m/s2
-d) 7.2 m/s2
+e) 8.3 m/s2

5) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) south
-c) northeast
-d) north
+e) northwest

6) A car is traveling east and slowing down. The acceleration is

-a) zero
-b) to the east
+c) to the west

7) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
+b) southeast
-c) north
-d) south
-e) northwest

8) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 0.68 s
-b) 0.78 s
-c) 0.9 s
-d) 1.03 s
+e) 1.19 s

9) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down

10) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

-a) 23.15 N.
-b) 26.62 N.
+c) 30.62 N.
-d) 35.21 N.
-e) 40.49 N.

11) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) southwest
-c) southeast
-d) northwest
-e) west

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
-b) the cloth is more slippery when it is pulled quickly
+c) the cloth is accelerating for such a brief time that there is little motion
13)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
-a) 6.27 N.
-b) 7.22 N.
-c) 8.3 N.
-d) 9.54 N.
+e) 10.97 N.

14) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.1
-b) 0.12
-c) 0.14
-d) 0.17
+e) 0.2

15) A car is traveling east and speeding up. The acceleration is

-a) zero
+b) to the east
-c) to the west

#### Key: G2

1) If you toss a coin into the air, the acceleration on the way down is

-a) zero
+b) down
-c) up
2)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
-a) 34.19 N.
-b) 39.32 N.
-c) 45.21 N.
-d) 52 N.
+e) 59.79 N.

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) south
-c) southwest
+d) northwest
-e) north

4) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

5) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.
6)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
-a) 6.3 m/s2
-b) 7.2 m/s2
-c) 8.3 m/s2
-d) 9.5 m/s2
+e) 11 m/s2

7) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.1
-b) 0.12
-c) 0.14
-d) 0.17
+e) 0.2

8) A car is traveling east and speeding up. The acceleration is

-a) zero
+b) to the east
-c) to the west
9)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the tension, T1?
-a) 36.22 N.
+b) 41.66 N.
-c) 47.91 N.
-d) 55.09 N.
-e) 63.36 N.

10) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
-b) objects don't begin to accelerate until after the force has been applied
+c) the cloth is accelerating for such a brief time that there is little motion

11) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

-a) 1.25 s
-b) 1.44 s
+c) 1.65 s
-d) 1.9 s
-e) 2.18 s

12) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
+b) southeast
-c) south
-d) northwest
-e) north

13) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

14) What is the gravitational acceleration on a plant that is 1.34 times more massive than Earth, and a radius that is 1.88 times greater than Earths?

-a) 2.4 m/s2
-b) 2.8 m/s2
-c) 3.2 m/s2
+d) 3.7 m/s2
-e) 4.3 m/s2

15) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) southwest
-b) southeast
-c) west
-d) northwest
-e) south

### Key: H0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
-b) objects don't begin to accelerate until after the force has been applied
+c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
-b) zero
+c) down

3) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) zero
-c) down

4) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) up
-c) zero

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northwest
+c) northeast
-d) southwest
-e) north

6) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) southeast
+c) north
-d) northeast
-e) northeast

7) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) west
-c) southeast
+d) southwest
-e) south

8) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.31
-b) 0.37
-c) 0.44
+d) 0.53
-e) 0.64

9) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

-a) 1.87 s
+b) 2.15 s
-c) 2.47 s
-d) 2.85 s
-e) 3.27 s

10) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees
11)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.
12)
In the figure shown, θ1 is 17 degrees , and θ3 is 29 degrees . The mass has a weight of 29 N. What is the tension, T1?
-a) 20.16 N.
-b) 23.18 N.
-c) 26.66 N.
-d) 30.66 N.
+e) 35.26 N.

13) Nine barefoot baseball players, with a total mass of 664 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.53 . The net mass of the (shoed) basketball team is 418 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.334
-b) 0.367
-c) 0.404
-d) 0.444
-e) 0.488

14) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

+a) 0.019
-b) 0.022
-c) 0.025
-d) 0.029
-e) 0.033

15) What is the gravitational acceleration on a plant that is 1.73 times more dense than Earth, and a radius that is 2.44 times greater than Earth's?

+a) 41.4 m/s2
-b) 47.6 m/s2
-c) 54.7 m/s2
-d) 62.9 m/s2
-e) 72.4 m/s2

#### Key: H1

1) Nine barefoot baseball players, with a total mass of 692 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 406 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.358
-b) 0.394
-c) 0.433
-d) 0.476
-e) 0.524

2) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.5 m/s2?

+a) 70.3 degrees
-b) 80.9 degrees
-c) 93 degrees
-d) 106.9 degrees
-e) 123 degrees

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) north
-c) southwest
-d) northwest
+e) northeast

4) If you toss a coin into the air, the velocity on the way down is

-a) up
+b) down
-c) zero
5)
In the figure shown, θ1 is 20 degrees , and θ3 is 33 degrees . The mass has a weight of 31 N. What is the tension, T1?
+a) 32.55 N.
-b) 37.44 N.
-c) 43.05 N.
-d) 49.51 N.
-e) 56.94 N.

6) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

-a) 0.017
-b) 0.02
-c) 0.023
-d) 0.026
+e) 0.03

7) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) west
-b) northwest
-c) south
-d) southeast
+e) southwest

8) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

-a) 1.05 s
+b) 1.21 s
-c) 1.39 s
-d) 1.6 s
-e) 1.84 s

9) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
-b) the cloth is more slippery when it is pulled quickly
+c) the cloth is accelerating for such a brief time that there is little motion

10) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.44
+b) 0.53
-c) 0.64
-d) 0.76
-e) 0.92

11) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) up
-c) zero

12) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

-a) 24 m/s2
-b) 27.7 m/s2
+c) 31.8 m/s2
-d) 36.6 m/s2
-e) 42.1 m/s2

13) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) down
-c) zero

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) southeast
-c) northeast
-d) northeast
+e) north
15)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
+a) 32.5 N.
-b) 39 N.
-c) 46.8 N.
-d) 56.2 N.
-e) 67.4 N.

#### Key: H2

1) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
-b) zero
+c) down

2) Nine barefoot baseball players, with a total mass of 692 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 406 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.358
-b) 0.394
-c) 0.433
-d) 0.476
-e) 0.524

3) What is the gravitational acceleration on a plant that is 2.98 times more dense than Earth, and a radius that is 1.81 times greater than Earth's?

-a) 30.2 m/s2
-b) 34.8 m/s2
-c) 40 m/s2
-d) 46 m/s2
+e) 52.9 m/s2

4) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

-a) 0.017
-b) 0.02
-c) 0.023
-d) 0.026
+e) 0.03

5) If you toss a coin into the air, the velocity on the way up is

-a) down
+b) up
-c) zero

6) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.44
+b) 0.53
-c) 0.64
-d) 0.76
-e) 0.92

7) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

8) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) southeast
+b) north
-c) northeast
-d) northeast
-e) northwest
9)
In the figure shown, θ1 is 17 degrees , and θ3 is 33 degrees . The mass has a 'weight' of 33 N. What is the tension, T1?
-a) 27.32 N.
-b) 31.42 N.
+c) 36.13 N.
-d) 41.55 N.
-e) 47.78 N.

10) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees

11) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) southwest
-b) southeast
-c) west
-d) northwest
-e) south

12) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

-a) 1.25 s
-b) 1.44 s
+c) 1.65 s
-d) 1.9 s
-e) 2.18 s
13)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
-a) 21.2 N.
-b) 25.4 N.
-c) 30.5 N.
-d) 36.6 N.
+e) 43.9 N.

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) north
-c) southwest
+d) northeast
-e) northwest

15) If you toss a coin into the air, the velocity on the way down is

-a) up
+b) down
-c) zero

### Key: I0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
+b) the cloth is accelerating for such a brief time that there is little motion
-c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) north
+c) northeast
-d) south
-e) southwest

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) southwest
-b) northwest
-c) southeast
-d) south
-e) west

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) southeast
-b) south
-c) north
-d) northeast
-e) northwest

6) If you toss a coin into the air, the acceleration on the way up is

-a) zero
-b) up
+c) down

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) south
-b) east
-c) zero
+d) west
-e) north

8) A mass with weight (mg) equal to 21 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 66 degrees with respect to the horizontal. What is the tension in each string?

-a) 6.6 N.
-b) 7.6 N.
-c) 8.7 N.
-d) 10 N.
+e) 11.5 N.

9) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

-a) 53.7 degrees
-b) 61.8 degrees
+c) 71 degrees
-d) 81.7 degrees
-e) 93.9 degrees

11) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

+a) 18.6 N.
-b) 21.4 N.
-c) 24.6 N.
-d) 28.3 N.
-e) 32.6 N.
12)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
-a) 21.2 N.
-b) 25.4 N.
-c) 30.5 N.
-d) 36.6 N.
+e) 43.9 N.
13)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
-a) 66.7 N
-b) 76.7 N
-c) 88.3 N
-d) 101.5 N
+e) 116.7 N

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

-a) 0.006
-b) 0.007
-c) 0.008
-d) 0.009
+e) 0.01

15) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

+a) 10.3 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
-e) 18 m/s2

#### Key: I1

1) A merry-go round has a period of 0.34 minutes. What is the minimum coefficient of static friction that would allow a 51.4 kg person to stand3.09 meters from the center, without grabbing something?

-a) 0.017
-b) 0.02
-c) 0.023
-d) 0.026
+e) 0.03

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) south
-c) north
+d) northeast
-e) southwest

3) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up
4)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
-a) 66.7 N
-b) 76.7 N
-c) 88.3 N
-d) 101.5 N
+e) 116.7 N

5) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

+a) west
-b) zero
-c) south
-d) east
-e) north

6) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

-a) 27.4 N.
-b) 31.5 N.
-c) 36.2 N.
-d) 41.7 N.
+e) 47.9 N.

7) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

-a) 1.87 s
+b) 2.15 s
-c) 2.47 s
-d) 2.85 s
-e) 3.27 s

8) In the figure "3 tensions" shown above θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the weight?

+a) 20.1 N.
-b) 23.1 N.
-c) 26.6 N.
-d) 30.5 N.
-e) 35.1 N.

9) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) south
+c) southeast
-d) north
-e) northeast
10)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.

11) What is the gravitational acceleration on a plant that is 1.83 times more massive than Earth, and a radius that is 1.38 times greater than Earths?

-a) 8.2 m/s2
+b) 9.4 m/s2
-c) 10.8 m/s2
-d) 12.5 m/s2
-e) 14.3 m/s2

12) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) southeast
+c) southwest
-d) south
-e) west

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly

14) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees

15) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) zero
-c) up

#### Key: I2

1) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

+a) west
-b) zero
-c) east
-d) south
-e) north

2) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

-a) 53.7 degrees
-b) 61.8 degrees
+c) 71 degrees
-d) 81.7 degrees
-e) 93.9 degrees

3) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

-a) 0.008
-b) 0.009
-c) 0.01
-d) 0.012
+e) 0.014

4) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
+b) down
-c) zero
5)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
-a) 34.8 N.
+b) 41.8 N.
-c) 50.2 N.
-d) 60.2 N.
-e) 72.3 N.

6) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

-a) 1.05 s
+b) 1.21 s
-c) 1.39 s
-d) 1.6 s
-e) 1.84 s

7) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northeast
-c) north
+d) southeast
-e) northwest

8) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly
9)
In the figure shown, the mass of m1 is 6 kg, and the mass of m2 is 3.2 kg. If the external force, Fext on m2 is 173 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.31, and that for m2 the coefficient is 0.44 .
+a) 110.2 N
-b) 126.7 N
-c) 145.7 N
-d) 167.6 N
-e) 192.7 N

10) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southeast
+b) southwest
-c) west
-d) south
-e) northwest

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) northeast
-b) north
-c) southwest
-d) south
-e) northwest

12) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

-a) 27.4 N.
-b) 31.5 N.
-c) 36.2 N.
-d) 41.7 N.
+e) 47.9 N.
13)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
-a) 20.1 N.
-b) 23.1 N.
-c) 26.6 N.
-d) 30.6 N.
+e) 35.2 N.

14) If you toss a coin into the air, the acceleration on the way up is

-a) zero
-b) up
+c) down

15) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

+a) 10.3 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
-e) 18 m/s2

### Key: J0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly

2) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
+b) down
-c) up

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
+b) northeast
-c) northwest
-d) south
-e) southwest

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) northeast
-c) south
-d) southwest
+e) north

5) A car is traveling east and slowing down. The acceleration is

+a) to the west
-b) zero
-c) to the east

6) A car is traveling east and speeding up. The acceleration is

-a) to the west
-b) zero
+c) to the east

7) If you toss a coin into the air, the acceleration on the way up is

-a) up
-b) zero
+c) down

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

-a) 12.8 N.
-b) 14.8 N.
-c) 17 N.
+d) 19.5 N.
-e) 22.5 N.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

10) A sled of mass 5.2 kg is at rest on a rough surface. A string pulls with a tension of 45.3N at an angle of 59 degress above the horizontal. What is the normal force?

-a) 10.55 N.
+b) 12.13 N.
-c) 13.95 N.
-d) 16.04 N.
-e) 18.45 N.
11)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
-a) 26.66 N.
-b) 30.66 N.
-c) 35.25 N.
+d) 40.54 N.
-e) 46.62 N.

12) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

-a) 23.7 N.
-b) 27.3 N.
+c) 31.4 N.
-d) 36.1 N.
-e) 41.5 N.
13)
In the figure shown (with m1 = 5.1 kg, m2 = 3.5 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
-a) 13.7 m/s2
+b) 15.7 m/s2
-c) 18.1 m/s2
-d) 20.8 m/s2
-e) 23.9 m/s2

14) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

-a) 7.7 newtons.
-b) 8.8 newtons.
-c) 10.2 newtons.
+d) 11.7 newtons.
-e) 13.4 newtons.

15) What is the gravitational acceleration on a plant that is 1.23 times more dense than Earth, and a radius that is 1.83 times greater than Earth's?

-a) 19.2 m/s2
+b) 22.1 m/s2
-c) 25.4 m/s2
-d) 29.2 m/s2
-e) 33.5 m/s2

#### Key: J1

1) A car is traveling east and speeding up. The acceleration is

-a) to the west
+b) to the east
-c) zero

2) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

3) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

4) What is the gravitational acceleration on a plant that is 1.94 times more dense than Earth, and a radius that is 2.35 times greater than Earth's?

-a) 38.9 m/s2
+b) 44.7 m/s2
-c) 51.4 m/s2
-d) 59.1 m/s2
-e) 67.9 m/s2

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) southwest
-b) northeast
-c) northwest
+d) north
-e) south

6) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
+b) down
-c) up
7)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
-a) 31.26 N.
-b) 35.95 N.
+c) 41.34 N.
-d) 47.54 N.
-e) 54.68 N.

8) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

+a) 16.3 newtons.
-b) 18.8 newtons.
-c) 21.6 newtons.
-d) 24.8 newtons.
-e) 28.5 newtons.
9)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
-a) 9 m/s2
-b) 10.3 m/s2
-c) 11.8 m/s2
-d) 13.6 m/s2
+e) 15.7 m/s2

10) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

-a) 23.45 N.
-b) 26.97 N.
+c) 31.02 N.
-d) 35.67 N.
-e) 41.02 N.

11) A mass with weight (mg) of 48 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 46 degrees. What is the tension in the string?

-a) 22.7 N.
+b) 26.1 N.
-c) 30 N.
-d) 34.5 N.
-e) 39.7 N.

12) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) northeast
-b) south
-c) southwest
-d) northwest
-e) north

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
+b) the cloth is accelerating for such a brief time that there is little motion
-c) the cloth is more slippery when it is pulled quickly

14) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

15) In the figure "3 tensions" shown above θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the weight?

+a) 20.1 N.
-b) 23.1 N.
-c) 26.6 N.
-d) 30.5 N.
-e) 35.1 N.

#### Key: J2

1) A car is traveling east and speeding up. The acceleration is

-a) zero
-b) to the west
+c) to the east

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
-b) northwest
-c) southwest
+d) north
-e) south

3) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

-a) 24.29 N.
-b) 27.93 N.
+c) 32.12 N.
-d) 36.94 N.
-e) 42.48 N.

4) A mass with weight (mg) of 39 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 56 degrees. What is the tension in the string?

+a) 22.1 N.
-b) 25.4 N.
-c) 29.2 N.
-d) 33.6 N.
-e) 38.6 N.

5) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

-a) 32.4 newtons.
-b) 37.2 newtons.
+c) 42.8 newtons.
-d) 49.2 newtons.
-e) 56.6 newtons.
6)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
-a) 31.26 N.
-b) 35.95 N.
+c) 41.34 N.
-d) 47.54 N.
-e) 54.68 N.

7) In the figure "3 tensions" shown above θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the weight?

-a) 5.9 N.
-b) 6.8 N.
-c) 7.8 N.
+d) 9 N.
-e) 10.4 N.

8) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) zero
-c) up

9) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

-a) 24 m/s2
-b) 27.7 m/s2
+c) 31.8 m/s2
-d) 36.6 m/s2
-e) 42.1 m/s2

10) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) northeast
-c) northwest
-d) north
-e) southwest

11) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

-a) 10.99 N.
-b) 12.64 N.
-c) 14.54 N.
+d) 16.72 N.
-e) 19.22 N.
12)
In the figure shown (with m1 = 5.1 kg, m2 = 3.5 kg, and Fext = 135 N), what is the acceleration? Assume no friction is present.
-a) 13.7 m/s2
+b) 15.7 m/s2
-c) 18.1 m/s2
-d) 20.8 m/s2
-e) 23.9 m/s2

13) A car is traveling east and slowing down. The acceleration is

+a) to the west
-b) zero
-c) to the east

14) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) up
-c) zero

15) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
+b) the cloth is accelerating for such a brief time that there is little motion
-c) objects don't begin to accelerate until after the force has been applied

### Key: K0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
-b) objects don't begin to accelerate until after the force has been applied
+c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the velocity on the way up is

-a) down
+b) up
-c) zero

3) If you toss a coin into the air, the velocity on the way down is

-a) zero
-b) up
+c) down

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) southeast
-c) west
-d) south
+e) southwest

5) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) to the west
-c) zero

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

+a) west
-b) north
-c) east
-d) zero
-e) south

7) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
-b) zero
-c) away from Earth
+d) towards Earth
-e) opposite the direction of the Moon's velocity

8) A mass with weight (mg) 7.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 1.64 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.1
-b) 0.12
-c) 0.14
-d) 0.17
+e) 0.2

9) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

+a) 2.6 s
-b) 2.99 s
-c) 3.43 s
-d) 3.95 s
-e) 4.54 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

+a) 74 degrees
-b) 85.1 degrees
-c) 97.8 degrees
-d) 112.5 degrees
-e) 129.4 degrees
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
+a) 32.66 N.
-b) 37.56 N.
-c) 43.2 N.
-d) 49.68 N.
-e) 57.13 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T2?
+a) 66.58 N.
-b) 76.56 N.
-c) 88.05 N.
-d) 101.25 N.
-e) 116.44 N.
13)
In the figure shown, the mass of m1 is 5.2 kg, and the mass of m2 is 2.9 kg. If the external force, Fext on m2 is 179 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.36, and that for m2 the coefficient is 0.46 .
-a) 74.4 N
-b) 85.5 N
-c) 98.3 N
+d) 113.1 N
-e) 130.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.

15) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

-a) 8.6 newtons.
-b) 9.9 newtons.
-c) 11.4 newtons.
-d) 13.1 newtons.
+e) 15.1 newtons.

#### Key: K1

1) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees

2) If you toss a coin into the air, the velocity on the way down is

-a) up
-b) zero
+c) down

3) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) south
-c) west
-d) southeast
+e) southwest
4)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
-a) 6.27 N.
-b) 7.22 N.
-c) 8.3 N.
-d) 9.54 N.
+e) 10.97 N.
5)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
-a) 66.7 N
-b) 76.7 N
-c) 88.3 N
-d) 101.5 N
+e) 116.7 N

6) As the Moon circles Earth, the acceleration of the Moon is

-a) opposite the direction of the Moon's velocity
+b) towards Earth
-c) zero
-d) away from Earth
-e) in the same direction as the Moon's velocity

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) east
+b) west
-c) south
-d) north
-e) zero

8) A car is traveling west and slowing down. The acceleration is

-a) zero
-b) to the west
+c) to the east

9) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 0.68 s
-b) 0.78 s
-c) 0.9 s
-d) 1.03 s
+e) 1.19 s
10)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
+a) 60.54 N.
-b) 69.62 N.
-c) 80.06 N.
-d) 92.07 N.
-e) 105.88 N.

11) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.198 rad/sec. How many minutes does it take to complete 10.5 revolutions?

-a) 4.83 minutes.
+b) 5.55 minutes.
-c) 6.39 minutes.
-d) 7.34 minutes.
-e) 8.45 minutes.

12) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

-a) 4.4 newtons.
-b) 5.1 newtons.
-c) 5.9 newtons.
+d) 6.8 newtons.
-e) 7.8 newtons.

13) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
+b) the cloth is accelerating for such a brief time that there is little motion
-c) the cloth is more slippery when it is pulled quickly

14) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.52
+b) 0.63
-c) 0.76
-d) 0.91
-e) 1.09

15) If you toss a coin into the air, the velocity on the way up is

-a) down
-b) zero
+c) up

#### Key: K2

1) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) southwest
-b) west
-c) south
-d) northwest
-e) southeast

2) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

3) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) zero
-c) opposite the direction of the Moon's velocity
-d) in the same direction as the Moon's velocity
-e) away from Earth

4) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

-a) 53.7 degrees
-b) 61.8 degrees
+c) 71 degrees
-d) 81.7 degrees
-e) 93.9 degrees

5) A car is traveling west and slowing down. The acceleration is

-a) to the west
-b) zero
+c) to the east

6) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.93 minutes.
+b) 6.82 minutes.
-c) 7.84 minutes.
-d) 9.02 minutes.
-e) 10.37 minutes.

7) If you toss a coin into the air, the velocity on the way down is

-a) up
+b) down
-c) zero

8) A mass with weight (mg) 10.8 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.53 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.38
+b) 0.46
-c) 0.55
-d) 0.66
-e) 0.79

9) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) south
-b) east
-c) north
+d) west
-e) zero
10)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
-a) 82 N
-b) 94.3 N
+c) 108.5 N
-d) 124.8 N
-e) 143.5 N
11)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
-a) 30.78 N.
-b) 35.4 N.
+c) 40.71 N.
-d) 46.82 N.
-e) 53.84 N.

12) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 0.68 s
-b) 0.78 s
-c) 0.9 s
-d) 1.03 s
+e) 1.19 s
13)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
-a) 13.3 N.
-b) 15.3 N.
-c) 17.59 N.
-d) 20.23 N.
+e) 23.27 N.

14) If you toss a coin into the air, the velocity on the way up is

-a) zero
+b) up
-c) down

15) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

-a) 32.4 newtons.
-b) 37.2 newtons.
+c) 42.8 newtons.
-d) 49.2 newtons.
-e) 56.6 newtons.

### Key: L0

1) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
-b) zero
+c) down

2) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) up
-c) zero

3) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
+b) zero
-c) down

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
+b) northwest
-c) northeast
-d) south
-e) north

5) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) northeast
-c) northwest
-d) northeast
-e) southeast

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) south
-b) north
+c) east
-d) zero
-e) west

7) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

8) A mass with weight (mg) equal to 33 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 72 degrees with respect to the horizontal. What is the tension in each string?

-a) 9.9 N.
-b) 11.4 N.
-c) 13.1 N.
-d) 15.1 N.
+e) 17.3 N.

9) A sled of mass 5.5 kg is at rest on a rough surface. A string pulls with a tension of 41.3N at an angle of 34 degress above the horizontal. What is the normal force?

-a) 26.79 N.
+b) 30.81 N.
-c) 35.43 N.
-d) 40.74 N.
-e) 46.85 N.

10) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees

11) In the figure "3 tensions" shown above θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the weight?

-a) 5.9 N.
-b) 6.8 N.
-c) 7.8 N.
+d) 9 N.
-e) 10.4 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
-a) 36.74 N.
-b) 42.25 N.
+c) 48.58 N.
-d) 55.87 N.
-e) 64.25 N.

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.422
+b) 0.465
-c) 0.511
-d) 0.562
-e) 0.619

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 73.9 kg person to stand2.94 meters from the center, without grabbing something?

-a) 0.017
-b) 0.019
-c) 0.022
+d) 0.025
-e) 0.029

15) What is the gravitational acceleration on a plant that is 1.94 times more dense than Earth, and a radius that is 2.35 times greater than Earth's?

-a) 38.9 m/s2
+b) 44.7 m/s2
-c) 51.4 m/s2
-d) 59.1 m/s2
-e) 67.9 m/s2

#### Key: L1

1)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
-a) 36.74 N.
-b) 42.25 N.
+c) 48.58 N.
-d) 55.87 N.
-e) 64.25 N.

2) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

-a) 61.1 N.
+b) 70.3 N.
-c) 80.8 N.
-d) 92.9 N.
-e) 106.9 N.

3) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

-a) 0.03
-b) 0.034
-c) 0.039
+d) 0.045
-e) 0.052

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) northeast
-c) northeast
+d) north
-e) southeast

5) Nine barefoot baseball players, with a total mass of 679 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 380 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.31
+b) 0.341
-c) 0.376
-d) 0.413
-e) 0.454

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) zero
-b) north
-c) south
-d) west
+e) east

7) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees

8) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

-a) 25.5 N.
-b) 29.3 N.
+c) 33.7 N.
-d) 38.7 N.
-e) 44.5 N.

9) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) north
+b) northwest
-c) southwest
-d) northeast
-e) south

10) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
+b) down
-c) zero

11) If you toss a coin into the air, the acceleration on the way down is

-a) up
-b) zero
+c) down

12) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

13) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 41.9N at an angle of 42 degress above the horizontal. What is the normal force?

-a) 18.94 N.
-b) 21.78 N.
-c) 25.05 N.
+d) 28.8 N.
-e) 33.12 N.

14) If you toss a coin into the air, the velocity while it as its highest point is

-a) down
-b) up
+c) zero

15) What is the gravitational acceleration on a plant that is 1.29 times more dense than Earth, and a radius that is 1.53 times greater than Earth's?

-a) 12.7 m/s2
-b) 14.6 m/s2
-c) 16.8 m/s2
+d) 19.3 m/s2
-e) 22.2 m/s2

#### Key: L2

1) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) west
-b) north
-c) south
+d) east
-e) zero

2) Nine barefoot baseball players, with a total mass of 625 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.54 . The net mass of the (shoed) basketball team is 445 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.263
-b) 0.289
-c) 0.318
-d) 0.35
+e) 0.384

3) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
-b) zero
+c) down

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) northeast
-c) southeast
-d) northeast
-e) northwest

5) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

-a) 0.03
-b) 0.034
-c) 0.039
+d) 0.045
-e) 0.052

6) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees

7) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

-a) 24 m/s2
-b) 27.7 m/s2
+c) 31.8 m/s2
-d) 36.6 m/s2
-e) 42.1 m/s2

8) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

-a) 16.81 N.
-b) 19.33 N.
+c) 22.23 N.
-d) 25.57 N.
-e) 29.4 N.

9) If you toss a coin into the air, the velocity on the way down is

-a) zero
+b) down
-c) up

10) If you toss a coin into the air, the velocity while it as its highest point is

+a) zero
-b) up
-c) down

11) If you toss a coin into the air, the acceleration on the way down is

-a) zero
+b) down
-c) up
12)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the weight?
-a) 13.6 N.
-b) 15.6 N.
+c) 17.9 N.
-d) 20.6 N.
-e) 23.7 N.
13)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
-a) 30.78 N.
-b) 35.4 N.
+c) 40.71 N.
-d) 46.82 N.
-e) 53.84 N.

14) A mass with weight (mg) equal to 44 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 60 degrees with respect to the horizontal. What is the tension in each string?

-a) 14.5 N.
-b) 16.7 N.
-c) 19.2 N.
-d) 22.1 N.
+e) 25.4 N.

15) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) north
+b) northwest
-c) south
-d) southwest
-e) northeast

### Key: M0

1) If you toss a coin into the air, the velocity on the way up is

-a) down
+b) up
-c) zero

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) northeast
-c) southwest
-d) north
-e) northwest

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) northwest
-c) southwest
-d) northeast
-e) south

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) south
-c) southeast
+d) southwest
-e) west

5) A car is traveling east and speeding up. The acceleration is

-a) to the west
+b) to the east
-c) zero

6) As the Moon circles Earth, the acceleration of the Moon is

-a) away from Earth
+b) towards Earth
-c) zero
-d) opposite the direction of the Moon's velocity
-e) in the same direction as the Moon's velocity

7) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) up
-c) zero

8) A mass with weight (mg) equal to 33 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 72 degrees with respect to the horizontal. What is the tension in each string?

-a) 9.9 N.
-b) 11.4 N.
-c) 13.1 N.
-d) 15.1 N.
+e) 17.3 N.

9) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

-a) 16.81 N.
-b) 19.33 N.
+c) 22.23 N.
-d) 25.57 N.
-e) 29.4 N.

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

-a) 1.4 s
-b) 1.61 s
+c) 1.86 s
-d) 2.13 s
-e) 2.45 s

11) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

-a) 23.7 N.
-b) 27.3 N.
+c) 31.4 N.
-d) 36.1 N.
-e) 41.5 N.
12)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
-a) 45.03 N.
+b) 51.78 N.
-c) 59.55 N.
-d) 68.48 N.
-e) 78.75 N.

13) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.36 . But the team wins a game of tug of war due to their superior mass of 683 kg. They are playing against a 5 person basketball team with a net mass of 406 kg. What is the maximum coefficient of static friction of the basketball team?

-a) 0.455
-b) 0.501
-c) 0.551
+d) 0.606
-e) 0.666

14) A merry-go round has a period of 0.32 minutes. What is the centripetal force on a 88.1 kg person who is standing 1.73 meters from the center?

+a) 16.3 newtons.
-b) 18.8 newtons.
-c) 21.6 newtons.
-d) 24.8 newtons.
-e) 28.5 newtons.

15) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

+a) 8.3 m/s2
-b) 9.5 m/s2
-c) 11 m/s2
-d) 12.6 m/s2
-e) 14.5 m/s2

#### Key: M1

1) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.23 . But the team wins a game of tug of war due to their superior mass of 675 kg. They are playing against a 5 person basketball team with a net mass of 394 kg. What is the maximum coefficient of static friction of the basketball team?

+a) 0.394
-b) 0.433
-c) 0.477
-d) 0.524
-e) 0.577
2)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
-a) 39.08 N.
-b) 44.94 N.
+c) 51.69 N.
-d) 59.44 N.
-e) 68.35 N.

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) south
-c) northwest
-d) southwest
+e) northeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) south
-c) northeast
-d) southwest
-e) northwest

5) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 41.9N at an angle of 42 degress above the horizontal. What is the normal force?

-a) 18.94 N.
-b) 21.78 N.
-c) 25.05 N.
+d) 28.8 N.
-e) 33.12 N.

6) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

-a) 27.4 N.
-b) 31.5 N.
-c) 36.2 N.
-d) 41.7 N.
+e) 47.9 N.

7) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s

8) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) away from Earth
-c) opposite the direction of the Moon's velocity
-d) zero
-e) in the same direction as the Moon's velocity

9) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

+a) 8.3 m/s2
-b) 9.5 m/s2
-c) 11 m/s2
-d) 12.6 m/s2
-e) 14.5 m/s2

10) A car is traveling east and speeding up. The acceleration is

-a) to the west
-b) zero
+c) to the east

11) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down

12) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) west
-b) southeast
+c) southwest
-d) south
-e) northwest

13) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

-a) 25.5 N.
-b) 29.3 N.
+c) 33.7 N.
-d) 38.7 N.
-e) 44.5 N.

14) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) down
-c) zero

15) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 51.9 kg person who is standing 1.26 meters from the center?

-a) 6.1 newtons.
-b) 7 newtons.
-c) 8 newtons.
-d) 9.2 newtons.
+e) 10.6 newtons.

#### Key: M2

1) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 40.1N at an angle of 42 degress above the horizontal. What is the normal force?

+a) 29.03 N.
-b) 33.38 N.
-c) 38.39 N.
-d) 44.15 N.
-e) 50.77 N.

2) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) west
-b) south
-c) northwest
-d) southeast
+e) southwest

3) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

-a) 4.7 m/s2
-b) 5.4 m/s2
-c) 6.2 m/s2
-d) 7.2 m/s2
+e) 8.3 m/s2

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) north
-c) southwest
+d) northeast
-e) northwest

5) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) down
-c) zero

6) If you toss a coin into the air, the acceleration on the way down is

-a) zero
+b) down
-c) up
7)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
-a) 39.08 N.
-b) 44.94 N.
+c) 51.69 N.
-d) 59.44 N.
-e) 68.35 N.

8) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
-b) zero
-c) opposite the direction of the Moon's velocity
+d) towards Earth
-e) away from Earth

9) A car is traveling east and speeding up. The acceleration is

-a) to the west
-b) zero
+c) to the east

10) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.23 . But the team wins a game of tug of war due to their superior mass of 607 kg. They are playing against a 5 person basketball team with a net mass of 429 kg. What is the maximum coefficient of static friction of the basketball team?

-a) 0.269
-b) 0.296
+c) 0.325
-d) 0.358
-e) 0.394

11) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

-a) 4.4 newtons.
-b) 5.1 newtons.
-c) 5.9 newtons.
+d) 6.8 newtons.
-e) 7.8 newtons.

12) In the figure "3 tensions" shown above θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the weight?

+a) 40.3 N.
-b) 46.4 N.
-c) 53.3 N.
-d) 61.3 N.
-e) 70.5 N.

13) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
-b) southwest
-c) south
-d) northwest
+e) north

14) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s

15) A mass with weight (mg) equal to 41 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 30 degrees with respect to the horizontal. What is the tension in each string?

-a) 23.4 N.
-b) 27 N.
-c) 31 N.
-d) 35.7 N.
+e) 41 N.

### Key: N0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
+b) the cloth is accelerating for such a brief time that there is little motion
-c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
+b) down
-c) up

3) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) zero
-c) down

4) A car is traveling west and slowing down. The acceleration is

-a) to the west
-b) zero
+c) to the east

5) A car is traveling east and slowing down. The acceleration is

-a) zero
+b) to the west
-c) to the east

6) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

7) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) away from Earth
-c) zero
-d) opposite the direction of the Moon's velocity
-e) in the same direction as the Moon's velocity

8) A mass with weight (mg) equal to 21 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 66 degrees with respect to the horizontal. What is the tension in each string?

-a) 6.6 N.
-b) 7.6 N.
-c) 8.7 N.
-d) 10 N.
+e) 11.5 N.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

+a) 74 degrees
-b) 85.1 degrees
-c) 97.8 degrees
-d) 112.5 degrees
-e) 129.4 degrees
11)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
-a) 46.5 N.
+b) 55.8 N.
-c) 67 N.
-d) 80.4 N.
-e) 96.5 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
-a) 29.52 N.
-b) 33.95 N.
+c) 39.04 N.
-d) 44.9 N.
-e) 51.63 N.
13)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
-a) 82 N
-b) 94.3 N
+c) 108.5 N
-d) 124.8 N
-e) 143.5 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.41 minutes.
+b) 6.22 minutes.
-c) 7.15 minutes.
-d) 8.22 minutes.
-e) 9.46 minutes.

15) What is the gravitational acceleration on a plant that is 1.83 times more massive than Earth, and a radius that is 1.38 times greater than Earths?

-a) 8.2 m/s2
+b) 9.4 m/s2
-c) 10.8 m/s2
-d) 12.5 m/s2
-e) 14.3 m/s2

#### Key: N1

1)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
-a) 82 N
-b) 94.3 N
+c) 108.5 N
-d) 124.8 N
-e) 143.5 N

2) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 59 degrees with respect to the horizontal. What is the tension in each string?

-a) 21.3 N.
+b) 24.5 N.
-c) 28.2 N.
-d) 32.4 N.
-e) 37.3 N.

3) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) opposite the direction of the Moon's velocity
-c) in the same direction as the Moon's velocity
-d) away from Earth
-e) zero

4) What is the gravitational acceleration on a plant that is 1.83 times more massive than Earth, and a radius that is 1.38 times greater than Earths?

-a) 8.2 m/s2
+b) 9.4 m/s2
-c) 10.8 m/s2
-d) 12.5 m/s2
-e) 14.3 m/s2
5)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
-a) 22.7 N.
-b) 26.11 N.
-c) 30.02 N.
-d) 34.53 N.
+e) 39.71 N.

6) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.

8) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) zero
-c) to the west

9) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

-a) 21.31 N.
-b) 24.5 N.
-c) 28.18 N.
+d) 32.4 N.
-e) 37.26 N.

10) If you toss a coin into the air, the velocity on the way up is

-a) zero
+b) up
-c) down

11) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) zero
-c) up

12) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
+b) down
-c) up

13) A car is traveling east and slowing down. The acceleration is

-a) zero
-b) to the east
+c) to the west

14) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
+b) the cloth is accelerating for such a brief time that there is little motion
-c) the cloth is more slippery when it is pulled quickly
15)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
-a) 21.2 N.
-b) 25.4 N.
-c) 30.5 N.
-d) 36.6 N.
+e) 43.9 N.

#### Key: N2

1) If you toss a coin into the air, the velocity on the way up is

-a) down
+b) up
-c) zero

2) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) up
-c) zero
3)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
-a) 34.8 N.
+b) 41.8 N.
-c) 50.2 N.
-d) 60.2 N.
-e) 72.3 N.

4) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
+b) down
-c) up

5) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) to the west
-c) zero

6) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly

7) As the Moon circles Earth, the acceleration of the Moon is

-a) away from Earth
-b) opposite the direction of the Moon's velocity
-c) zero
-d) in the same direction as the Moon's velocity
+e) towards Earth
8)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
-a) 34.19 N.
-b) 39.32 N.
-c) 45.21 N.
-d) 52 N.
+e) 59.79 N.

9) A mass with weight (mg) equal to 34 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 14 degrees with respect to the horizontal. What is the tension in each string?

-a) 61.1 N.
+b) 70.3 N.
-c) 80.8 N.
-d) 92.9 N.
-e) 106.9 N.

10) A car is traveling east and slowing down. The acceleration is

-a) zero
+b) to the west
-c) to the east

11) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

12) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees
13)
In the figure shown, the mass of m1 is 5.2 kg, and the mass of m2 is 2.9 kg. If the external force, Fext on m2 is 179 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.36, and that for m2 the coefficient is 0.46 .
-a) 74.4 N
-b) 85.5 N
-c) 98.3 N
+d) 113.1 N
-e) 130.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

-a) 3.05 minutes.
-b) 3.51 minutes.
-c) 4.03 minutes.
+d) 4.64 minutes.
-e) 5.33 minutes.

15) What is the gravitational acceleration on a plant that is 1.34 times more massive than Earth, and a radius that is 1.45 times greater than Earths?

-a) 4.7 m/s2
-b) 5.4 m/s2
+c) 6.2 m/s2
-d) 7.2 m/s2
-e) 8.3 m/s2

### Key: O0

1) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) northwest
-b) northeast
-c) south
-d) north
-e) southwest

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) northwest
-c) north
-d) south
+e) northeast

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
+b) north
-c) southeast
-d) northwest
-e) northeast

4) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) northwest
-c) south
+d) southeast
-e) northeast

5) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) to the west
-c) zero

6) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

7) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
-b) away from Earth
+c) towards Earth
-d) zero
-e) opposite the direction of the Moon's velocity

8) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

-a) 11.4 N.
-b) 13.1 N.
-c) 15.1 N.
-d) 17.4 N.
+e) 20 N.

9) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

+a) 2.6 s
-b) 2.99 s
-c) 3.43 s
-d) 3.95 s
-e) 4.54 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 48.4 degrees
-b) 55.7 degrees
+c) 64 degrees
-d) 73.6 degrees
-e) 84.7 degrees
11)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
-a) 45.03 N.
+b) 51.78 N.
-c) 59.55 N.
-d) 68.48 N.
-e) 78.75 N.
12)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
+a) 32.5 N.
-b) 39 N.
-c) 46.8 N.
-d) 56.2 N.
-e) 67.4 N.
13)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 141 N, what is the tension in the connecting string? Assume no friction is present.
-a) 58.2 N
-b) 67 N
-c) 77 N
-d) 88.6 N
+e) 101.8 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.

15) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

-a) 0.008
-b) 0.009
-c) 0.01
-d) 0.012
+e) 0.014

#### Key: O1

1) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 9.8 m/s?

-a) 1.87 s
+b) 2.15 s
-c) 2.47 s
-d) 2.85 s
-e) 3.27 s

2) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) zero
-c) to the west
3)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T1?
+a) 40.7 N.
-b) 48.9 N.
-c) 58.7 N.
-d) 70.4 N.
-e) 84.5 N.

4) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.168 rad/sec. How many minutes does it take to complete 6.5 revolutions?

-a) 2.66 minutes.
-b) 3.06 minutes.
-c) 3.52 minutes.
+d) 4.05 minutes.
-e) 4.66 minutes.

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northwest
-c) north
+d) northeast
-e) southwest

6) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) in the same direction as the Moon's velocity
-c) zero
-d) opposite the direction of the Moon's velocity
-e) away from Earth

7) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) southeast
+b) north
-c) northeast
-d) northeast
-e) northwest
8)
In the figure shown, the mass of m1 is 5.1 kg, and the mass of m2 is 2.8 kg. If the external force, Fext on m2 is 148 N, what is the tension in the connecting string? Assume no friction is present.
+a) 95.5 N
-b) 109.9 N
-c) 126.4 N
-d) 145.3 N
-e) 167.1 N

9) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees

10) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) southeast
-c) northwest
-d) northeast
-e) north
11)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
-a) 45.03 N.
+b) 51.78 N.
-c) 59.55 N.
-d) 68.48 N.
-e) 78.75 N.

12) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) northeast
-c) south
-d) north
+e) northwest

13) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 73.9 kg person to stand2.94 meters from the center, without grabbing something?

-a) 0.017
-b) 0.019
-c) 0.022
+d) 0.025
-e) 0.029

15) A mass with weight (mg) of 49 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 54 degrees. What is the tension in the string?

+a) 27.5 N.
-b) 31.6 N.
-c) 36.4 N.
-d) 41.8 N.
-e) 48.1 N.

#### Key: O2

1) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees

2) As the Moon circles Earth, the acceleration of the Moon is

-a) zero
-b) in the same direction as the Moon's velocity
-c) away from Earth
-d) opposite the direction of the Moon's velocity
+e) towards Earth

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) south
-c) northwest
-d) northeast
+e) southeast
4)
In the figure shown, the mass of m1 is 5.1 kg, and the mass of m2 is 2.8 kg. If the external force, Fext on m2 is 148 N, what is the tension in the connecting string? Assume no friction is present.
+a) 95.5 N
-b) 109.9 N
-c) 126.4 N
-d) 145.3 N
-e) 167.1 N
5)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
-a) 30.78 N.
-b) 35.4 N.
+c) 40.71 N.
-d) 46.82 N.
-e) 53.84 N.

6) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) northwest
-b) north
-c) southwest
-d) northeast
-e) south

7) A mass with weight (mg) of 42 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 46 degrees. What is the tension in the string?

-a) 15 N.
-b) 17.3 N.
-c) 19.8 N.
+d) 22.8 N.
-e) 26.2 N.

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) northeast
-b) southwest
-c) south
-d) north
-e) northwest

9) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.

10) A car is traveling west and slowing down. The acceleration is

-a) zero
-b) to the west
+c) to the east

11) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

12) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

-a) 0.006
-b) 0.007
-c) 0.008
-d) 0.009
+e) 0.01

13) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 0.68 s
-b) 0.78 s
-c) 0.9 s
-d) 1.03 s
+e) 1.19 s

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) northeast
-c) southeast
-d) northeast
+e) north
15)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T1?
-a) 30.9 N.
-b) 37.1 N.
-c) 44.5 N.
+d) 53.5 N.
-e) 64.1 N.

### Key: P0

1) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
-b) up
+c) down

2) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
-b) down
+c) zero

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
+b) north
-c) northwest
-d) northeast
-e) southwest

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) west
-b) northwest
+c) southwest
-d) southeast
-e) south

5) A car is traveling east and speeding up. The acceleration is

+a) to the east
-b) to the west
-c) zero

6) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
+b) towards Earth
-c) opposite the direction of the Moon's velocity
-d) zero
-e) away from Earth

7) If you toss a coin into the air, the acceleration on the way down is

-a) up
-b) zero
+c) down

8) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.4 m/s2.
-b) 7.3 m/s2.
-c) 8.4 m/s2.
-d) 9.7 m/s2.
+e) 11.1 m/s2.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

-a) 10.99 N.
-b) 12.64 N.
-c) 14.54 N.
+d) 16.72 N.
-e) 19.22 N.
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
+a) 32.66 N.
-b) 37.56 N.
-c) 43.2 N.
-d) 49.68 N.
-e) 57.13 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
-a) 34.8 N.
+b) 41.8 N.
-c) 50.2 N.
-d) 60.2 N.
-e) 72.3 N.

13) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.21 . But the team wins a game of tug of war due to their superior mass of 683 kg. They are playing against a 5 person basketball team with a net mass of 389 kg. What is the maximum coefficient of static friction of the basketball team?

-a) 0.277
-b) 0.305
-c) 0.335
+d) 0.369
-e) 0.406

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.41 minutes.
+b) 6.22 minutes.
-c) 7.15 minutes.
-d) 8.22 minutes.
-e) 9.46 minutes.

15) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

-a) 4.1 m/s2
-b) 4.7 m/s2
-c) 5.4 m/s2
-d) 6.2 m/s2
+e) 7.2 m/s2

#### Key: P1

1) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

-a) 4.1 m/s2
-b) 4.7 m/s2
-c) 5.4 m/s2
-d) 6.2 m/s2
+e) 7.2 m/s2

2) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

3) A 2.5 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 11 N. What is the magnitude (absolute value) of the acceleration?

-a) 7.3 m/s2.
+b) 8.4 m/s2.
-c) 9.7 m/s2.
-d) 11.1 m/s2.
-e) 12.8 m/s2.

4) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
-b) zero
+c) down

5) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 40.1N at an angle of 42 degress above the horizontal. What is the normal force?

+a) 29.03 N.
-b) 33.38 N.
-c) 38.39 N.
-d) 44.15 N.
-e) 50.77 N.

6) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.15 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.77 minutes.
+b) 6.63 minutes.
-c) 7.63 minutes.
-d) 8.77 minutes.
-e) 10.09 minutes.
7)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
-a) 46.5 N.
+b) 55.8 N.
-c) 67 N.
-d) 80.4 N.
-e) 96.5 N.

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
-b) southwest
+c) north
-d) northeast
-e) northwest

9) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
+b) southwest
-c) south
-d) west
-e) southeast

10) As the Moon circles Earth, the acceleration of the Moon is

-a) zero
-b) in the same direction as the Moon's velocity
+c) towards Earth
-d) away from Earth
-e) opposite the direction of the Moon's velocity
11)
In the figure shown, θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the tension, T1?
-a) 31.26 N.
-b) 35.95 N.
+c) 41.34 N.
-d) 47.54 N.
-e) 54.68 N.

12) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.38 . But the team wins a game of tug of war due to their superior mass of 671 kg. They are playing against a 5 person basketball team with a net mass of 438 kg. What is the maximum coefficient of static friction of the basketball team?

-a) 0.481
-b) 0.529
+c) 0.582
-d) 0.64
-e) 0.704

13) A car is traveling east and speeding up. The acceleration is

-a) zero
+b) to the east
-c) to the west

14) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

-a) 23.15 N.
-b) 26.62 N.
+c) 30.62 N.
-d) 35.21 N.
-e) 40.49 N.

15) If you toss a coin into the air, the velocity while it as its highest point is

+a) zero
-b) down
-c) up

#### Key: P2

1) If you toss a coin into the air, the velocity while it as its highest point is

-a) down
-b) up
+c) zero
2)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
-a) 11.96 N.
-b) 13.75 N.
-c) 15.82 N.
+d) 18.19 N.
-e) 20.92 N.

3) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down

4) A 3.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.29 . In addition to the surface friction, there is also an air drag equal to 21 N. What is the magnitude (absolute value) of the acceleration?

-a) 8.2 m/s2.
+b) 9.4 m/s2.
-c) 10.8 m/s2.
-d) 12.4 m/s2.
-e) 14.3 m/s2.

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
+b) north
-c) southwest
-d) northeast
-e) northwest

6) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 40.1N at an angle of 42 degress above the horizontal. What is the normal force?

+a) 29.03 N.
-b) 33.38 N.
-c) 38.39 N.
-d) 44.15 N.
-e) 50.77 N.

7) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) west
-b) northwest
+c) southwest
-d) south
-e) southeast

8) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

9) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
-b) zero
+c) towards Earth
-d) away from Earth
-e) opposite the direction of the Moon's velocity

10) A car is traveling east and speeding up. The acceleration is

+a) to the east
-b) to the west
-c) zero

11) Without their shoes, members of a 9 person baseball team have a coefficient of static friction of only 0.21 . But the team wins a game of tug of war due to their superior mass of 683 kg. They are playing against a 5 person basketball team with a net mass of 389 kg. What is the maximum coefficient of static friction of the basketball team?

-a) 0.277
-b) 0.305
-c) 0.335
+d) 0.369
-e) 0.406

12) What is the gravitational acceleration on a plant that is 2.05 times more massive than Earth, and a radius that is 1.56 times greater than Earths?

-a) 4.7 m/s2
-b) 5.4 m/s2
-c) 6.2 m/s2
-d) 7.2 m/s2
+e) 8.3 m/s2

13) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.93 minutes.
+b) 6.82 minutes.
-c) 7.84 minutes.
-d) 9.02 minutes.
-e) 10.37 minutes.

14) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.
15)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T1?
+a) 40.7 N.
-b) 48.9 N.
-c) 58.7 N.
-d) 70.4 N.
-e) 84.5 N.

### Key: Q0

1) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
+b) down
-c) zero

2) If you toss a coin into the air, the velocity on the way down is

-a) zero
+b) down
-c) up

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
+b) north
-c) southwest
-d) northwest
-e) south

4) A car is traveling east and speeding up. The acceleration is

-a) zero
-b) to the west
+c) to the east

5) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) south
+b) west
-c) north
-d) east
-e) zero

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) west
-b) north
-c) south
+d) east
-e) zero

8) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

-a) 11.4 N.
-b) 13.1 N.
-c) 15.1 N.
-d) 17.4 N.
+e) 20 N.

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

-a) 1.25 s
-b) 1.44 s
+c) 1.65 s
-d) 1.9 s
-e) 2.18 s

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees
11)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
+a) 60.54 N.
-b) 69.62 N.
-c) 80.06 N.
-d) 92.07 N.
-e) 105.88 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
-a) 22.7 N.
-b) 26.11 N.
-c) 30.02 N.
-d) 34.53 N.
+e) 39.71 N.
13)
In the figure shown, the mass of m1 is 5.1 kg, and the mass of m2 is 3.5 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
-a) 45.8 N
-b) 52.6 N
-c) 60.5 N
-d) 69.6 N
+e) 80.1 N

14) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

-a) 32.4 newtons.
-b) 37.2 newtons.
+c) 42.8 newtons.
-d) 49.2 newtons.
-e) 56.6 newtons.

15) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

-a) 0.008
-b) 0.009
-c) 0.01
-d) 0.012
+e) 0.014

#### Key: Q1

1) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 77.6 kg person to stand1.59 meters from the center, without grabbing something?

-a) 0.008
-b) 0.009
-c) 0.011
+d) 0.012
-e) 0.014

2) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

3) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

-a) 11.4 N.
-b) 13.1 N.
-c) 15.1 N.
-d) 17.4 N.
+e) 20 N.

4) If you toss a coin into the air, the acceleration on the way up is

-a) up
-b) zero
+c) down

5) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees

6) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) southwest
+c) north
-d) northeast
-e) south

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) south
-b) zero
-c) north
+d) east
-e) west
8)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
+a) 60.54 N.
-b) 69.62 N.
-c) 80.06 N.
-d) 92.07 N.
-e) 105.88 N.

9) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 77.6 kg person who is standing 1.59 meters from the center?

+a) 9.4 newtons.
-b) 10.8 newtons.
-c) 12.4 newtons.
-d) 14.3 newtons.
-e) 16.4 newtons.
10)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
-a) 74.4 N
+b) 85.5 N
-c) 98.4 N
-d) 113.1 N
-e) 130.1 N

11) A car is traveling east and speeding up. The acceleration is

-a) zero
-b) to the west
+c) to the east

12) A sled of mass 5.4 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.2N at an angle of 58 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

+a) 2.6 s
-b) 2.99 s
-c) 3.43 s
-d) 3.95 s
-e) 4.54 s
13)
In the figure shown, θ1 is 20 degrees , and θ3 is 33 degrees . The mass has a weight of 31 N. What is the tension, T1?
+a) 32.55 N.
-b) 37.44 N.
-c) 43.05 N.
-d) 49.51 N.
-e) 56.94 N.

14) If you toss a coin into the air, the velocity on the way down is

-a) zero
-b) up
+c) down

15) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) east
+b) west
-c) north
-d) zero
-e) south

#### Key: Q2

1)
In the figure shown, the mass of m1 is 5.4 kg, and the mass of m2 is 2.3 kg. If the external force, Fext on m2 is 138 N, what is the tension in the connecting string? Assume no friction is present.
-a) 84.2 N
+b) 96.8 N
-c) 111.3 N
-d) 128 N
-e) 147.2 N
2)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
-a) 22.7 N.
-b) 26.11 N.
-c) 30.02 N.
-d) 34.53 N.
+e) 39.71 N.

3) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

+a) 0.021
-b) 0.024
-c) 0.028
-d) 0.032
-e) 0.036

4) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

-a) 12.8 N.
-b) 14.8 N.
-c) 17 N.
+d) 19.5 N.
-e) 22.5 N.

5) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.3N at an angle of 40 degress above the horizontal. How long will it take to reach a speed of 10.3 m/s?

-a) 1.4 s
-b) 1.61 s
+c) 1.86 s
-d) 2.13 s
-e) 2.45 s

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) north
-b) zero
-c) east
-d) south
+e) west

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) south
-b) west
+c) east
-d) north
-e) zero

8) A car is traveling east and speeding up. The acceleration is

-a) to the west
-b) zero
+c) to the east

9) If you toss a coin into the air, the velocity on the way down is

-a) zero
+b) down
-c) up

10) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

-a) 4.4 newtons.
-b) 5.1 newtons.
-c) 5.9 newtons.
+d) 6.8 newtons.
-e) 7.8 newtons.

11) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

12) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) zero
-c) up

13) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

+a) 74 degrees
-b) 85.1 degrees
-c) 97.8 degrees
-d) 112.5 degrees
-e) 129.4 degrees
14)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
-a) 30.78 N.
-b) 35.4 N.
+c) 40.71 N.
-d) 46.82 N.
-e) 53.84 N.

15) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
-b) northwest
-c) northeast
+d) north
-e) southwest

### Key: R0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
-b) up
+c) down

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
+b) north
-c) southeast
-d) northeast
-e) northwest

4) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) to the west
-c) zero

5) A car is traveling east and speeding up. The acceleration is

-a) zero
+b) to the east
-c) to the west

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) west
+b) east
-c) zero
-d) north
-e) south

7) As the Moon circles Earth, the acceleration of the Moon is

-a) away from Earth
-b) opposite the direction of the Moon's velocity
-c) zero
+d) towards Earth
-e) in the same direction as the Moon's velocity

8) A 3 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.27 . In addition to the surface friction, there is also an air drag equal to 7 N. What is the magnitude (absolute value) of the acceleration?

-a) 3.8 m/s2.
-b) 4.3 m/s2.
+c) 5 m/s2.
-d) 5.7 m/s2.
-e) 6.6 m/s2.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

10) A sled of mass 5.1 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 47.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 0.68 s
-b) 0.78 s
-c) 0.9 s
-d) 1.03 s
+e) 1.19 s
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
-a) 11.96 N.
-b) 13.75 N.
-c) 15.82 N.
+d) 18.19 N.
-e) 20.92 N.

12) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

-a) 23.7 N.
-b) 27.3 N.
+c) 31.4 N.
-d) 36.1 N.
-e) 41.5 N.
13)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 159 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.46 .
-a) 82 N
-b) 94.3 N
+c) 108.5 N
-d) 124.8 N
-e) 143.5 N

14) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

-a) 8.6 newtons.
-b) 9.9 newtons.
-c) 11.4 newtons.
-d) 13.1 newtons.
+e) 15.1 newtons.

15) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

-a) 0.006
-b) 0.007
-c) 0.008
-d) 0.009
+e) 0.01

#### Key: R1

1) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

-a) 25.5 N.
-b) 29.3 N.
+c) 33.7 N.
-d) 38.7 N.
-e) 44.5 N.

2) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

-a) 7.7 newtons.
-b) 8.8 newtons.
-c) 10.2 newtons.
+d) 11.7 newtons.
-e) 13.4 newtons.

3) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
-b) up
+c) down

4) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

5) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 77.6 kg person to stand1.59 meters from the center, without grabbing something?

-a) 0.008
-b) 0.009
-c) 0.011
+d) 0.012
-e) 0.014

6) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

7) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) to the west
-c) zero
8)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
-a) 26.66 N.
-b) 30.66 N.
-c) 35.25 N.
+d) 40.54 N.
-e) 46.62 N.
9)
In the figure shown, the mass of m1 is 6.5 kg, and the mass of m2 is 3 kg. If the external force, Fext on m2 is 175 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.33, and that for m2 the coefficient is 0.48 .
-a) 66.7 N
-b) 76.7 N
-c) 88.3 N
-d) 101.5 N
+e) 116.7 N

10) A sled of mass 5.7 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 41.7N at an angle of 55 degress above the horizontal. How long will it take to reach a speed of 10.5 m/s?

-a) 1.89 s
-b) 2.18 s
+c) 2.5 s
-d) 2.88 s
-e) 3.31 s

11) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) southeast
-b) northwest
+c) north
-d) northeast
-e) northeast

12) As the Moon circles Earth, the acceleration of the Moon is

-a) away from Earth
-b) in the same direction as the Moon's velocity
-c) opposite the direction of the Moon's velocity
-d) zero
+e) towards Earth

13) A 2.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.59 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.9 m/s2.
-b) 8 m/s2.
-c) 9.2 m/s2.
-d) 10.6 m/s2.
+e) 12.1 m/s2.

14) A car is traveling east and speeding up. The acceleration is

-a) zero
-b) to the west
+c) to the east

15) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

+a) east
-b) west
-c) north
-d) south
-e) zero

#### Key: R2

1)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
-a) 10.01 N.
-b) 11.51 N.
-c) 13.23 N.
-d) 15.22 N.
+e) 17.5 N.

2) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

3) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) away from Earth
-c) opposite the direction of the Moon's velocity
-d) zero
-e) in the same direction as the Moon's velocity

4) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) to the west
-c) zero

5) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

-a) 0.03
-b) 0.034
-c) 0.039
+d) 0.045
-e) 0.052

6) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) northeast
-c) northeast
-d) southeast
+e) north

7) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.4 m/s2.
-b) 7.3 m/s2.
-c) 8.4 m/s2.
-d) 9.7 m/s2.
+e) 11.1 m/s2.

8) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) north
-b) south
+c) east
-d) west
-e) zero

9) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

10) A car is traveling east and speeding up. The acceleration is

-a) zero
-b) to the west
+c) to the east
11)
In the figure shown, the mass of m1 is 5.7 kg, and the mass of m2 is 3.1 kg. If the external force, Fext on m2 is 137 N, what is the tension in the connecting string? Assume that m1 has a kinetic coefficient of friction equal to 0.34, and that for m2 the coefficient is 0.47 .
-a) 56.7 N
-b) 65.2 N
-c) 74.9 N
+d) 86.2 N
-e) 99.1 N

12) A merry-go round has a period of 0.34 minutes. What is the centripetal force on a 51.4 kg person who is standing 3.09 meters from the center?

-a) 8.6 newtons.
-b) 9.9 newtons.
-c) 11.4 newtons.
-d) 13.1 newtons.
+e) 15.1 newtons.

13) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

-a) 1.25 s
-b) 1.44 s
+c) 1.65 s
-d) 1.9 s
-e) 2.18 s

14) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
-b) objects don't begin to accelerate until after the force has been applied
+c) the cloth is accelerating for such a brief time that there is little motion

15) In the figure "3 tensions" shown above θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the weight?

-a) 23.7 N.
-b) 27.3 N.
+c) 31.4 N.
-d) 36.1 N.
-e) 41.5 N.

### Key: S0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

2) If you toss a coin into the air, the velocity on the way up is

-a) down
-b) zero
+c) up

3) If you toss a coin into the air, the velocity while it as its highest point is

-a) down
+b) zero
-c) up

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) northeast
-b) south
-c) north
-d) northwest
-e) southwest

5) A car is traveling west and slowing down. The acceleration is

-a) to the west
-b) zero
+c) to the east

6) A car is traveling east and slowing down. The acceleration is

+a) to the west
-b) zero
-c) to the east

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

+a) east
-b) zero
-c) west
-d) south
-e) north

8) A 3.1 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.43 . In addition to the surface friction, there is also an air drag equal to 12 N. What is the magnitude (absolute value) of the acceleration?

-a) 4.6 m/s2.
-b) 5.3 m/s2.
-c) 6.1 m/s2.
-d) 7 m/s2.
+e) 8.1 m/s2.

9) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees
11)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
-a) 26.66 N.
-b) 30.66 N.
-c) 35.25 N.
+d) 40.54 N.
-e) 46.62 N.

12) In the figure "3 tensions" shown above θ1 is 18 degrees, and θ3 is 35 degrees. The tension T3 is 48 N. What is the weight?

+a) 40.3 N.
-b) 46.4 N.
-c) 53.3 N.
-d) 61.3 N.
-e) 70.5 N.
13)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
-a) 9 m/s2
-b) 10.3 m/s2
-c) 11.8 m/s2
-d) 13.6 m/s2
+e) 15.7 m/s2

14) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

+a) 0.021
-b) 0.024
-c) 0.028
-d) 0.032
-e) 0.036

15) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

-a) 4.1 m/s2
-b) 4.7 m/s2
-c) 5.4 m/s2
-d) 6.2 m/s2
+e) 7.2 m/s2

#### Key: S1

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
-b) the cloth is more slippery when it is pulled quickly
+c) the cloth is accelerating for such a brief time that there is little motion
2)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
-a) 13.3 N.
-b) 15.3 N.
-c) 17.59 N.
-d) 20.23 N.
+e) 23.27 N.

3) A car is traveling east and slowing down. The acceleration is

+a) to the west
-b) zero
-c) to the east

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northwest
+c) northeast
-d) southwest
-e) north

5) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

-a) 4.8 m/s2
-b) 5.5 m/s2
-c) 6.4 m/s2
+d) 7.3 m/s2
-e) 8.4 m/s2

6) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

-a) 36.3 degrees
-b) 41.7 degrees
-c) 47.9 degrees
-d) 55.1 degrees
+e) 63.4 degrees

7) In the figure "3 tensions" shown above θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the weight?

-a) 5.9 N.
-b) 6.8 N.
-c) 7.8 N.
+d) 9 N.
-e) 10.4 N.

8) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) zero
-c) down

9) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

+a) 0.021
-b) 0.024
-c) 0.028
-d) 0.032
-e) 0.036
10)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
-a) 9 m/s2
-b) 10.3 m/s2
-c) 11.8 m/s2
-d) 13.6 m/s2
+e) 15.7 m/s2

11) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) west
+b) east
-c) south
-d) zero
-e) north

12) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
-b) down
+c) zero

13) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

-a) 23.15 N.
-b) 26.62 N.
+c) 30.62 N.
-d) 35.21 N.
-e) 40.49 N.

14) A car is traveling west and slowing down. The acceleration is

-a) to the west
-b) zero
+c) to the east

15) A 3.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.29 . In addition to the surface friction, there is also an air drag equal to 21 N. What is the magnitude (absolute value) of the acceleration?

-a) 8.2 m/s2.
+b) 9.4 m/s2.
-c) 10.8 m/s2.
-d) 12.4 m/s2.
-e) 14.3 m/s2.

#### Key: S2

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) the cloth is more slippery when it is pulled quickly
+b) the cloth is accelerating for such a brief time that there is little motion
-c) objects don't begin to accelerate until after the force has been applied

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) south
-c) north
-d) southwest
+e) northeast
3)
In the figure shown (with m1 = 5.1 kg, m2 = 2.8 kg, and Fext = 148 N), what is the acceleration? Assume no friction is present.
-a) 14.2 m/s2
-b) 16.3 m/s2
+c) 18.7 m/s2
-d) 21.5 m/s2
-e) 24.8 m/s2
4)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the weight?
-a) 13.6 N.
-b) 15.6 N.
+c) 17.9 N.
-d) 20.6 N.
-e) 23.7 N.

5) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

-a) 24.29 N.
-b) 27.93 N.
+c) 32.12 N.
-d) 36.94 N.
-e) 42.48 N.

6) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

-a) 4.1 m/s2
-b) 4.7 m/s2
-c) 5.4 m/s2
-d) 6.2 m/s2
+e) 7.2 m/s2

7) If you toss a coin into the air, the velocity on the way up is

-a) zero
+b) up
-c) down

8) A 3.1 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.43 . In addition to the surface friction, there is also an air drag equal to 12 N. What is the magnitude (absolute value) of the acceleration?

-a) 4.6 m/s2.
-b) 5.3 m/s2.
-c) 6.1 m/s2.
-d) 7 m/s2.
+e) 8.1 m/s2.

9) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning east, the acceleration is

-a) west
-b) zero
+c) east
-d) north
-e) south

10) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

+a) 0.019
-b) 0.022
-c) 0.025
-d) 0.029
-e) 0.033

11) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

12) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) zero
-c) to the west

13) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees

14) If you toss a coin into the air, the velocity while it as its highest point is

-a) down
-b) up
+c) zero
15)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
+a) 32.66 N.
-b) 37.56 N.
-c) 43.2 N.
-d) 49.68 N.
-e) 57.13 N.

### Key: T0

1) If you toss a coin into the air, the velocity on the way up is

-a) down
-b) zero
+c) up

2) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) north
-c) south
-d) northeast
+e) northwest

4) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

+a) southwest
-b) west
-c) southeast
-d) south
-e) northwest

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) southeast
-b) northeast
-c) south
-d) northwest
-e) north

6) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) south
-b) zero
-c) east
+d) west
-e) north

8) A mass with weight (mg) 8.9 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 5.12 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

+a) 0.7
-b) 0.84
-c) 1.01
-d) 1.21
-e) 1.45

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

-a) 19.64 N.
-b) 22.59 N.
-c) 25.98 N.
-d) 29.88 N.
+e) 34.36 N.

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 48.4 degrees
-b) 55.7 degrees
+c) 64 degrees
-d) 73.6 degrees
-e) 84.7 degrees
11)
In the figure shown, θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the tension, T1?
-a) 26.66 N.
-b) 30.66 N.
-c) 35.25 N.
+d) 40.54 N.
-e) 46.62 N.

12) In the figure "3 tensions" shown above θ1 is 16 degrees, and θ3 is 30 degrees. The tension T3 is 45 N. What is the weight?

-a) 25.5 N.
-b) 29.3 N.
+c) 33.7 N.
-d) 38.7 N.
-e) 44.5 N.

13) Nine barefoot baseball players, with a total mass of 625 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.54 . The net mass of the (shoed) basketball team is 445 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.263
-b) 0.289
-c) 0.318
-d) 0.35
+e) 0.384

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.188 rad/sec. How many minutes does it take to complete 6.5 revolutions?

-a) 2.74 minutes.
-b) 3.15 minutes.
+c) 3.62 minutes.
-d) 4.16 minutes.
-e) 4.79 minutes.

15) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

-a) 0.006
-b) 0.007
-c) 0.008
-d) 0.009
+e) 0.01

#### Key: T1

1) If you toss a coin into the air, the velocity on the way down is

-a) zero
+b) down
-c) up

2) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) northeast
-c) south
-d) north
+e) southeast

3) If you toss a coin into the air, the velocity on the way up is

-a) down
-b) zero
+c) up

4) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees

5) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

6) In the figure "3 tensions" shown above θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the weight?

+a) 18.6 N.
-b) 21.4 N.
-c) 24.6 N.
-d) 28.3 N.
-e) 32.6 N.
7)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
-a) 10.01 N.
-b) 11.51 N.
-c) 13.23 N.
-d) 15.22 N.
+e) 17.5 N.

8) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

-a) 3.05 minutes.
-b) 3.51 minutes.
-c) 4.03 minutes.
+d) 4.64 minutes.
-e) 5.33 minutes.

9) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) north
+b) west
-c) zero
-d) east
-e) south

10) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
+b) southwest
-c) southeast
-d) south
-e) west

11) A car is traveling east and slowing down. The acceleration is

-a) to the east
-b) zero
+c) to the west

12) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.447
-b) 0.492
-c) 0.541
-d) 0.595
-e) 0.655

13) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) northeast
-c) north
+d) northwest
-e) south

14) A mass with weight (mg) 6 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 3.2 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.52
+b) 0.63
-c) 0.76
-d) 0.91
-e) 1.09

15) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 73.9 kg person to stand2.94 meters from the center, without grabbing something?

-a) 0.017
-b) 0.019
-c) 0.022
+d) 0.025
-e) 0.029

#### Key: T2

1) If you toss a coin into the air, the velocity on the way down is

-a) up
+b) down
-c) zero

2) Nine barefoot baseball players, with a total mass of 679 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 380 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.31
+b) 0.341
-c) 0.376
-d) 0.413
-e) 0.454

3) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

-a) 0.019
+b) 0.022
-c) 0.026
-d) 0.03
-e) 0.034

4) A car is traveling east and slowing down. The acceleration is

-a) zero
+b) to the west
-c) to the east

5) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) southwest
-c) southeast
-d) northwest
-e) west

6) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) southeast
-c) northeast
-d) northwest
-e) north

7) If you toss a coin into the air, the velocity on the way up is

-a) down
-b) zero
+c) up
8)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the weight?
-a) 20.1 N.
-b) 23.1 N.
-c) 26.6 N.
-d) 30.6 N.
+e) 35.2 N.

9) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northeast
-c) southwest
+d) northwest
-e) north

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

-a) 17.21 N.
-b) 19.79 N.
-c) 22.76 N.
+d) 26.17 N.
-e) 30.1 N.
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
+a) 32.66 N.
-b) 37.56 N.
-c) 43.2 N.
-d) 49.68 N.
-e) 57.13 N.

12) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) south
-b) north
+c) west
-d) east
-e) zero

13) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.198 rad/sec. How many minutes does it take to complete 10.5 revolutions?

-a) 4.83 minutes.
+b) 5.55 minutes.
-c) 6.39 minutes.
-d) 7.34 minutes.
-e) 8.45 minutes.

14) A mass with weight (mg) 8.7 newtons is on a horzontal surface. It is being pulled on by a string at an angle of 30 degrees above the horizontal, with a force equal to 4.08 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

-a) 0.44
+b) 0.53
-c) 0.64
-d) 0.76
-e) 0.92

15) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees

### Key: U0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly

2) If you toss a coin into the air, the velocity on the way up is

-a) down
-b) zero
+c) up

3) If you toss a coin into the air, the velocity while it as its highest point is

-a) down
-b) up
+c) zero

4) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) northeast
-c) north
+d) northwest
-e) south

5) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southeast
-b) northwest
+c) southwest
-d) south
-e) west

6) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
-b) zero
-c) opposite the direction of the Moon's velocity
-d) away from Earth
+e) towards Earth

7) If you toss a coin into the air, the acceleration on the way down is

-a) up
+b) down
-c) zero

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 40 degrees. What is the tension in the string?

-a) 11.2 N.
-b) 12.9 N.
-c) 14.8 N.
+d) 17 N.
-e) 19.6 N.

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 40.3N at an angle of 43 degress above the horizontal. How long will it take to reach a speed of 9 m/s?

-a) 1.27 s
-b) 1.46 s
+c) 1.68 s
-d) 1.93 s
-e) 2.22 s

10) A sled of mass 2.5 kg is on perfectly smooth surface. A string pulls with a tension of 18.1N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2 m/s2?

+a) 74 degrees
-b) 85.1 degrees
-c) 97.8 degrees
-d) 112.5 degrees
-e) 129.4 degrees
11)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
-a) 6.27 N.
-b) 7.22 N.
-c) 8.3 N.
-d) 9.54 N.
+e) 10.97 N.
12)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
-a) 39.08 N.
-b) 44.94 N.
+c) 51.69 N.
-d) 59.44 N.
-e) 68.35 N.
13)
In the figure shown (with m1 = 6.5 kg, m2 = 2.5 kg, and Fext = 141 N), what is the acceleration? Assume no friction is present.
-a) 9 m/s2
-b) 10.3 m/s2
-c) 11.8 m/s2
-d) 13.6 m/s2
+e) 15.7 m/s2

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.

15) A merry-go round has a period of 0.38 minutes. What is the centripetal force on a 64.8 kg person who is standing 1.76 meters from the center?

-a) 5 newtons.
-b) 5.7 newtons.
-c) 6.5 newtons.
-d) 7.5 newtons.
+e) 8.7 newtons.

#### Key: U1

1)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
-a) 6.3 m/s2
-b) 7.2 m/s2
-c) 8.3 m/s2
-d) 9.5 m/s2
+e) 11 m/s2

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) northeast
-c) south
-d) north
+e) northwest
3)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
-a) 30.78 N.
-b) 35.4 N.
+c) 40.71 N.
-d) 46.82 N.
-e) 53.84 N.

4) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.41 minutes.
+b) 6.22 minutes.
-c) 7.15 minutes.
-d) 8.22 minutes.
-e) 9.46 minutes.

5) If you toss a coin into the air, the velocity on the way up is

-a) zero
-b) down
+c) up

6) A sled of mass 5.2 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 46N at an angle of 32 degress above the horizontal. How long will it take to reach a speed of 9.1 m/s?

-a) 1.05 s
+b) 1.21 s
-c) 1.39 s
-d) 1.6 s
-e) 1.84 s
7)
In the figure shown, θ1 is 19 degrees, and θ3 is 38 degrees. The tension T3 is 21 N. What is the tension, T1?
-a) 10.01 N.
-b) 11.51 N.
-c) 13.23 N.
-d) 15.22 N.
+e) 17.5 N.

8) A merry-go round has a period of 0.36 minutes. What is the centripetal force on a 67.1 kg person who is standing 1.19 meters from the center?

-a) 4.4 newtons.
-b) 5.1 newtons.
-c) 5.9 newtons.
+d) 6.8 newtons.
-e) 7.8 newtons.

9) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) southeast
-b) west
-c) south
+d) southwest
-e) northwest

10) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) zero
-c) up

11) If you toss a coin into the air, the velocity while it as its highest point is

-a) down
+b) zero
-c) up

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
-b) the cloth is more slippery when it is pulled quickly
+c) the cloth is accelerating for such a brief time that there is little motion

13) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) away from Earth
-c) opposite the direction of the Moon's velocity
-d) in the same direction as the Moon's velocity
-e) zero

14) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.3N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.5 m/s2?

+a) 70.3 degrees
-b) 80.9 degrees
-c) 93 degrees
-d) 106.9 degrees
-e) 123 degrees

15) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

-a) 11.4 N.
-b) 13.1 N.
-c) 15.1 N.
-d) 17.4 N.
+e) 20 N.

#### Key: U2

1) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) southwest
-c) south
+d) northwest
-e) northeast

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.16 rad/sec. How many minutes does it take to complete 9.5 revolutions?

-a) 5.41 minutes.
+b) 6.22 minutes.
-c) 7.15 minutes.
-d) 8.22 minutes.
-e) 9.46 minutes.

3) If you toss a coin into the air, the velocity on the way up is

-a) zero
-b) down
+c) up

4) A sled of mass 2 kg is on perfectly smooth surface. A string pulls with a tension of 17.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.9 m/s2?

-a) 53.3 degrees
-b) 61.3 degrees
+c) 70.5 degrees
-d) 81.1 degrees
-e) 93.3 degrees
5)
In the figure shown (with m1 = 6.7 kg, m2 = 2.5 kg, and Fext = 101 N), what is the acceleration? Assume no friction is present.
-a) 6.3 m/s2
-b) 7.2 m/s2
-c) 8.3 m/s2
-d) 9.5 m/s2
+e) 11 m/s2

6) A mass with weight (mg) of 27 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 70 degrees. What is the tension in the string?

-a) 12.5 N.
-b) 14.3 N.
+c) 16.5 N.
-d) 19 N.
-e) 21.8 N.
7)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
+a) 32.66 N.
-b) 37.56 N.
-c) 43.2 N.
-d) 49.68 N.
-e) 57.13 N.

8) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 53.3 kg person who is standing 1.35 meters from the center?

-a) 7.7 newtons.
-b) 8.8 newtons.
-c) 10.2 newtons.
+d) 11.7 newtons.
-e) 13.4 newtons.

9) A sled of mass 5.5 kg is at rest on a perfectly smooth surface. A string pulls with a tension of 42.8N at an angle of 36 degress above the horizontal. How long will it take to reach a speed of 10.4 m/s?

-a) 1.25 s
-b) 1.44 s
+c) 1.65 s
-d) 1.9 s
-e) 2.18 s

10) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
+b) zero
-c) down
11)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
+a) 60.54 N.
-b) 69.62 N.
-c) 80.06 N.
-d) 92.07 N.
-e) 105.88 N.

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
-b) the cloth is more slippery when it is pulled quickly
+c) the cloth is accelerating for such a brief time that there is little motion

13) A car is headed due north and decreasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northwest
+c) southwest
-d) southeast
-e) west

14) If you toss a coin into the air, the acceleration on the way down is

-a) zero
+b) down
-c) up

15) As the Moon circles Earth, the acceleration of the Moon is

-a) in the same direction as the Moon's velocity
-b) zero
+c) towards Earth
-d) away from Earth
-e) opposite the direction of the Moon's velocity

### Key: V0

1) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

-a) objects don't begin to accelerate until after the force has been applied
-b) the cloth is more slippery when it is pulled quickly
+c) the cloth is accelerating for such a brief time that there is little motion

2) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
+b) down
-c) zero

3) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) northeast
-b) northwest
-c) north
-d) south
-e) southwest

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) southwest
+b) north
-c) northeast
-d) south
-e) northwest

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) northeast
-c) northwest
-d) south
+e) southeast

6) If you toss a coin into the air, the acceleration on the way up is

-a) up
+b) down
-c) zero

7) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down

8) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

-a) 11.4 N.
-b) 13.1 N.
-c) 15.1 N.
-d) 17.4 N.
+e) 20 N.

9) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

-a) 17.21 N.
-b) 19.79 N.
-c) 22.76 N.
+d) 26.17 N.
-e) 30.1 N.

10) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

-a) 23.45 N.
-b) 26.97 N.
+c) 31.02 N.
-d) 35.67 N.
-e) 41.02 N.
11)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
-a) 36.74 N.
-b) 42.25 N.
+c) 48.58 N.
-d) 55.87 N.
-e) 64.25 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.
13)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
-a) 74.4 N
+b) 85.5 N
-c) 98.4 N
-d) 113.1 N
-e) 130.1 N

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 8.5 revolutions?

-a) 3.05 minutes.
-b) 3.51 minutes.
-c) 4.03 minutes.
+d) 4.64 minutes.
-e) 5.33 minutes.

15) What is the gravitational acceleration on a plant that is 1.92 times more dense than Earth, and a radius that is 1.69 times greater than Earth's?

-a) 24 m/s2
-b) 27.7 m/s2
+c) 31.8 m/s2
-d) 36.6 m/s2
-e) 42.1 m/s2

#### Key: V1

1) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) south
+c) southeast
-d) northeast
-e) northwest
2)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
-a) 45.03 N.
+b) 51.78 N.
-c) 59.55 N.
-d) 68.48 N.
-e) 78.75 N.

3) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) up
-c) zero
4)
In the figure shown, the mass of m1 is 7 kg, and the mass of m2 is 3.6 kg. If the external force, Fext on m2 is 153 N, what is the tension in the connecting string? Assume no friction is present.
-a) 66.4 N
-b) 76.4 N
-c) 87.9 N
+d) 101 N
-e) 116.2 N

5) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
+b) north
-c) southwest
-d) south
-e) northeast

6) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.174 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.69 minutes.
-b) 6.54 minutes.
+c) 7.52 minutes.
-d) 8.65 minutes.
-e) 9.95 minutes.

8) If you toss a coin into the air, the acceleration on the way up is

-a) zero
+b) down
-c) up

9) If you toss a coin into the air, the acceleration on the way down is

+a) down
-b) up
-c) zero
10)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
+a) 32.5 N.
-b) 39 N.
-c) 46.8 N.
-d) 56.2 N.
-e) 67.4 N.

11) What is the gravitational acceleration on a plant that is 1.94 times more dense than Earth, and a radius that is 2.35 times greater than Earth's?

-a) 38.9 m/s2
+b) 44.7 m/s2
-c) 51.4 m/s2
-d) 59.1 m/s2
-e) 67.9 m/s2

12) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) the cloth is more slippery when it is pulled quickly
-c) objects don't begin to accelerate until after the force has been applied

13) A mass with weight (mg) of 48 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 46 degrees. What is the tension in the string?

-a) 22.7 N.
+b) 26.1 N.
-c) 30 N.
-d) 34.5 N.
-e) 39.7 N.

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) southwest
-c) northwest
-d) south
+e) northeast

15) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

-a) 23.45 N.
-b) 26.97 N.
+c) 31.02 N.
-d) 35.67 N.
-e) 41.02 N.

#### Key: V2

1) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) northeast
+c) southeast
-d) northwest
-e) north

2) If you toss a coin into the air, the acceleration on the way down is

-a) zero
-b) up
+c) down

3) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.44 minutes.
-b) 6.25 minutes.
+c) 7.19 minutes.
-d) 8.27 minutes.
-e) 9.51 minutes.
4)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
-a) 74.4 N
+b) 85.5 N
-c) 98.4 N
-d) 113.1 N
-e) 130.1 N

5) If you toss a coin into the air, the acceleration on the way up is

-a) up
-b) zero
+c) down

6) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

-a) 21.31 N.
-b) 24.5 N.
-c) 28.18 N.
+d) 32.4 N.
-e) 37.26 N.
7)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.
8)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T2?
-a) 39.08 N.
-b) 44.94 N.
+c) 51.69 N.
-d) 59.44 N.
-e) 68.35 N.

9) What is the gravitational acceleration on a plant that is 1.29 times more dense than Earth, and a radius that is 1.53 times greater than Earth's?

-a) 12.7 m/s2
-b) 14.6 m/s2
-c) 16.8 m/s2
+d) 19.3 m/s2
-e) 22.2 m/s2

10) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
+b) north
-c) northeast
-d) south
-e) southwest

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) southwest
-b) south
+c) northeast
-d) northwest
-e) north

12) A sled of mass 5.5 kg is at rest on a rough surface. A string pulls with a tension of 41.3N at an angle of 34 degress above the horizontal. What is the normal force?

-a) 26.79 N.
+b) 30.81 N.
-c) 35.43 N.
-d) 40.74 N.
-e) 46.85 N.

13) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) up
-c) zero

14) When a table cloth is quickly pulled out from under dishes, they hardly move. This is because

+a) the cloth is accelerating for such a brief time that there is little motion
-b) objects don't begin to accelerate until after the force has been applied
-c) the cloth is more slippery when it is pulled quickly

15) A mass with weight (mg) of 39 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 56 degrees. What is the tension in the string?

+a) 22.1 N.
-b) 25.4 N.
-c) 29.2 N.
-d) 33.6 N.
-e) 38.6 N.

### Key: W0

1) If you toss a coin into the air, the acceleration while it as its highest point is

-a) zero
+b) down
-c) up

2) If you toss a coin into the air, the velocity on the way up is

-a) zero
-b) down
+c) up

3) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
+b) north
-c) northwest
-d) south
-e) southwest

5) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) zero
-c) up

6) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) east
-b) zero
+c) west
-d) north
-e) south

7) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) in the same direction as the Moon's velocity
-c) away from Earth
-d) zero
-e) opposite the direction of the Moon's velocity

8) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.4 m/s2.
-b) 7.3 m/s2.
-c) 8.4 m/s2.
-d) 9.7 m/s2.
+e) 11.1 m/s2.

9) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

-a) 21.31 N.
-b) 24.5 N.
-c) 28.18 N.
+d) 32.4 N.
-e) 37.26 N.

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees
11)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
-a) 55.74 N.
-b) 64.1 N.
-c) 73.72 N.
+d) 84.77 N.
-e) 97.49 N.
12)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.

13) Nine barefoot baseball players, with a total mass of 692 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.61 . The net mass of the (shoed) basketball team is 406 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.358
-b) 0.394
-c) 0.433
-d) 0.476
-e) 0.524

14) What is the gravitational acceleration on a plant that is 2.33 times more massive than Earth, and a radius that is 1.49 times greater than Earths?

+a) 10.3 m/s2
-b) 11.8 m/s2
-c) 13.6 m/s2
-d) 15.6 m/s2
-e) 18 m/s2

15) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

+a) 20.5 m/s2
-b) 23.5 m/s2
-c) 27.1 m/s2
-d) 31.1 m/s2
-e) 35.8 m/s2

#### Key: W1

1)
In the figure shown, θ is 21 degrees, and the mass is 3.1 kg. What is T2?
-a) 55.74 N.
-b) 64.1 N.
-c) 73.72 N.
+d) 84.77 N.
-e) 97.49 N.

2) As the Moon circles Earth, the acceleration of the Moon is

+a) towards Earth
-b) zero
-c) opposite the direction of the Moon's velocity
-d) in the same direction as the Moon's velocity
-e) away from Earth

3) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 46.8N at an angle of 56 degress above the horizontal. What is the magnitude of the friction?

-a) 17.21 N.
-b) 19.79 N.
-c) 22.76 N.
+d) 26.17 N.
-e) 30.1 N.

4) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) south
-b) east
-c) north
-d) zero
+e) west

5) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) up
-c) zero

6) A 2.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.59 . In addition to the surface friction, there is also an air drag equal to 14 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.9 m/s2.
-b) 8 m/s2.
-c) 9.2 m/s2.
-d) 10.6 m/s2.
+e) 12.1 m/s2.

7) A sled of mass 2.1 kg is on perfectly smooth surface. A string pulls with a tension of 17.7N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.6 m/s2?

-a) 56.3 degrees
+b) 64.7 degrees
-c) 74.4 degrees
-d) 85.6 degrees
-e) 98.4 degrees

8) If you toss a coin into the air, the acceleration while it as its highest point is

+a) down
-b) zero
-c) up

9) What is the gravitational acceleration on a plant that is 2.01 times more dense than Earth, and a radius that is 1.54 times greater than Earth's?

-a) 26.4 m/s2
+b) 30.3 m/s2
-c) 34.9 m/s2
-d) 40.1 m/s2
-e) 46.1 m/s2

10) What is the gravitational acceleration on a plant that is 2.21 times more massive than Earth, and a radius that is 1.74 times greater than Earths?

-a) 4.1 m/s2
-b) 4.7 m/s2
-c) 5.4 m/s2
-d) 6.2 m/s2
+e) 7.2 m/s2

11) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) southwest
+b) north
-c) south
-d) northwest
-e) northeast

12) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) zero
-c) down

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.447
-b) 0.492
-c) 0.541
-d) 0.595
-e) 0.655

14) If you toss a coin into the air, the velocity on the way down is

-a) up
-b) zero
+c) down
15)
In the figure shown, θ is 33 degrees, and the mass is 2.8 kg. What is T1?
-a) 35.2 N.
+b) 42.3 N.
-c) 50.7 N.
-d) 60.8 N.
-e) 73 N.

#### Key: W2

1) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

+a) 8.3 m/s2
-b) 9.5 m/s2
-c) 11 m/s2
-d) 12.6 m/s2
-e) 14.5 m/s2

2) If you toss a coin into the air, the velocity on the way up is

+a) up
-b) down
-c) zero

3) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

-a) 23.15 N.
-b) 26.62 N.
+c) 30.62 N.
-d) 35.21 N.
-e) 40.49 N.

4) If you toss a coin into the air, the acceleration on the way up is

-a) zero
+b) down
-c) up
5)
In the figure shown, θ is 36 degrees, and the mass is 3.1 kg. What is T1?
-a) 34.8 N.
+b) 41.8 N.
-c) 50.2 N.
-d) 60.2 N.
-e) 72.3 N.

6) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
-b) northeast
-c) southwest
-d) northwest
+e) north

7) Nine barefoot baseball players, with a total mass of 672 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.59 . The net mass of the (shoed) basketball team is 407 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.295
-b) 0.325
+c) 0.357
-d) 0.393
-e) 0.432

8) A 2.3 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 16 N. What is the magnitude (absolute value) of the acceleration?

-a) 7.2 m/s2.
-b) 8.3 m/s2.
-c) 9.5 m/s2.
+d) 11 m/s2.
-e) 12.6 m/s2.
9)
In the figure shown, θ is 33 degrees, and the mass is 2.7 kg. What is T2?
-a) 36.74 N.
-b) 42.25 N.
+c) 48.58 N.
-d) 55.87 N.
-e) 64.25 N.

10) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) zero
-b) south
-c) north
+d) west
-e) east

11) If you toss a coin into the air, the acceleration while it as its highest point is

-a) up
+b) down
-c) zero

12) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

13) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees

14) As the Moon circles Earth, the acceleration of the Moon is

-a) opposite the direction of the Moon's velocity
+b) towards Earth
-c) zero
-d) in the same direction as the Moon's velocity
-e) away from Earth

15) What is the gravitational acceleration on a plant that is 1.47 times more dense than Earth, and a radius that is 1.42 times greater than Earth's?

+a) 20.5 m/s2
-b) 23.5 m/s2
-c) 27.1 m/s2
-d) 31.1 m/s2
-e) 35.8 m/s2

### Key: X0

1) If you toss a coin into the air, the velocity on the way down is

-a) zero
-b) up
+c) down

2) If you toss a coin into the air, the velocity while it as its highest point is

-a) down
-b) up
+c) zero

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) northwest
-c) southeast
-d) northeast
-e) northeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) southwest
-b) northeast
+c) north
-d) south
-e) northwest

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) south
+b) southeast
-c) north
-d) northwest
-e) northeast

6) A car is traveling west and slowing down. The acceleration is

-a) to the west
+b) to the east
-c) zero

7) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

8) A mass with weight (mg) of 32 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 40 degrees. What is the tension in the string?

-a) 11.2 N.
-b) 12.9 N.
-c) 14.8 N.
+d) 17 N.
-e) 19.6 N.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

10) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 45.6N at an angle of 36 degress above the horizontal. What is the normal force?

-a) 23.45 N.
-b) 26.97 N.
+c) 31.02 N.
-d) 35.67 N.
-e) 41.02 N.
11)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
-a) 11.96 N.
-b) 13.75 N.
-c) 15.82 N.
+d) 18.19 N.
-e) 20.92 N.
12)
In the figure shown, θ1 is 18 degrees , and θ3 is 29 degrees . The mass has a weight of 50 N. What is the tension, T1?
-a) 34.19 N.
-b) 39.32 N.
-c) 45.21 N.
-d) 52 N.
+e) 59.79 N.
13)
In the figure shown, the mass of m1 is 6.4 kg, and the mass of m2 is 3.7 kg. If the external force, Fext on m2 is 135 N, what is the tension in the connecting string? Assume no friction is present.
-a) 74.4 N
+b) 85.5 N
-c) 98.4 N
-d) 113.1 N
-e) 130.1 N

14) A merry-go round has a period of 0.26 minutes. What is the centripetal force on a 51.9 kg person who is standing 1.26 meters from the center?

-a) 6.1 newtons.
-b) 7 newtons.
-c) 8 newtons.
-d) 9.2 newtons.
+e) 10.6 newtons.

15) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

-a) 0.019
+b) 0.022
-c) 0.026
-d) 0.03
-e) 0.034

#### Key: X1

1) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) southwest
-b) northeast
+c) north
-d) northwest
-e) south

2) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.3N at an angle of 40 degress above the horizontal. What is the magnitude of the friction?

-a) 21.31 N.
-b) 24.5 N.
-c) 28.18 N.
+d) 32.4 N.
-e) 37.26 N.

3) If you toss a coin into the air, the velocity on the way down is

-a) zero
-b) up
+c) down
4)
In the figure shown, θ1 is 17 degrees, and θ3 is 29 degrees. The tension T3 is 12 N. What is the tension, T1?
-a) 6.27 N.
-b) 7.22 N.
-c) 8.3 N.
-d) 9.54 N.
+e) 10.97 N.

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) northwest
-c) north
-d) south
+e) southeast

6) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) zero
-c) to the west
7)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
-a) 29.52 N.
-b) 33.95 N.
+c) 39.04 N.
-d) 44.9 N.
-e) 51.63 N.

8) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
+b) zero
-c) down

9) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

-a) 32.4 newtons.
-b) 37.2 newtons.
+c) 42.8 newtons.
-d) 49.2 newtons.
-e) 56.6 newtons.

10) A mass with weight (mg) of 49 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 54 degrees. What is the tension in the string?

+a) 27.5 N.
-b) 31.6 N.
-c) 36.4 N.
-d) 41.8 N.
-e) 48.1 N.

11) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

-a) 16.81 N.
-b) 19.33 N.
+c) 22.23 N.
-d) 25.57 N.
-e) 29.4 N.

12) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 77.6 kg person to stand1.59 meters from the center, without grabbing something?

-a) 0.008
-b) 0.009
-c) 0.011
+d) 0.012
-e) 0.014

13) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
+b) north
-c) northwest
-d) northeast
-e) southeast
15)
In the figure shown, the mass of m1 is 6.7 kg, and the mass of m2 is 2.5 kg. If the external force, Fext on m2 is 101 N, what is the tension in the connecting string? Assume no friction is present.
-a) 55.6 N
-b) 64 N
+c) 73.6 N
-d) 84.6 N
-e) 97.3 N

#### Key: X2

1) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
-b) southeast
-c) northeast
-d) northwest
+e) north
2)
In the figure shown, θ1 is 15 degrees, and θ3 is 36 degrees. The tension T3 is 39 N. What is the tension, T1?
+a) 32.66 N.
-b) 37.56 N.
-c) 43.2 N.
-d) 49.68 N.
-e) 57.13 N.

3) A merry-go round has a period of 0.22 minutes. What is the centripetal force on a 96.9 kg person who is standing 1.95 meters from the center?

-a) 32.4 newtons.
-b) 37.2 newtons.
+c) 42.8 newtons.
-d) 49.2 newtons.
-e) 56.6 newtons.

4) A sled of mass 5.7 kg is at rest on a rough surface. A string pulls with a tension of 43.9N at an angle of 50 degress above the horizontal. What is the normal force?

-a) 16.81 N.
-b) 19.33 N.
+c) 22.23 N.
-d) 25.57 N.
-e) 29.4 N.
5)
In the figure shown, θ1 is 17 degrees , and θ3 is 29 degrees . The mass has a weight of 29 N. What is the tension, T1?
-a) 20.16 N.
-b) 23.18 N.
-c) 26.66 N.
-d) 30.66 N.
+e) 35.26 N.

6) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
-b) northwest
-c) southwest
+d) north
-e) south

7) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
+b) southeast
-c) north
-d) south
-e) northeast

8) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

-a) 0.019
+b) 0.022
-c) 0.026
-d) 0.03
-e) 0.034

9) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

10) If you toss a coin into the air, the velocity on the way down is

-a) zero
+b) down
-c) up
11)
In the figure shown, the mass of m1 is 7 kg, and the mass of m2 is 3.6 kg. If the external force, Fext on m2 is 153 N, what is the tension in the connecting string? Assume no friction is present.
-a) 66.4 N
-b) 76.4 N
-c) 87.9 N
+d) 101 N
-e) 116.2 N

12) A car is traveling west and slowing down. The acceleration is

-a) to the west
+b) to the east
-c) zero

13) A mass with weight (mg) of 37 newtons is suspended symmetrically from two strings. The angle between the two strings (i.e. where they are attached to the mass) is 44 degrees. What is the tension in the string?

-a) 11.4 N.
-b) 13.1 N.
-c) 15.1 N.
-d) 17.4 N.
+e) 20 N.

14) If you toss a coin into the air, the velocity while it as its highest point is

+a) zero
-b) up
-c) down

15) A sled of mass 5.4 kg is at rest on a rough surface. A string pulls with a tension of 46.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

+a) 36.72 N.
-b) 42.23 N.
-c) 48.56 N.
-d) 55.85 N.
-e) 64.23 N.

### Key: Y0

1) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
-b) down
+c) zero

2) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
-b) northeast
-c) southwest
-d) northwest
+e) north

3) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) north
+c) southeast
-d) northeast
-e) south

4) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) zero
-c) to the west

5) A car is traveling east and speeding up. The acceleration is

-a) to the west
+b) to the east
-c) zero

6) If you toss a coin into the air, the acceleration on the way up is

-a) zero
-b) up
+c) down

7) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

-a) zero
-b) north
+c) west
-d) east
-e) south

8) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 59 degrees with respect to the horizontal. What is the tension in each string?

-a) 21.3 N.
+b) 24.5 N.
-c) 28.2 N.
-d) 32.4 N.
-e) 37.3 N.

9) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 41.2N at an angle of 42 degress above the horizontal. What is the magnitude of the friction?

-a) 23.15 N.
-b) 26.62 N.
+c) 30.62 N.
-d) 35.21 N.
-e) 40.49 N.

10) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

-a) 10.99 N.
-b) 12.64 N.
-c) 14.54 N.
+d) 16.72 N.
-e) 19.22 N.
11)
In the figure shown, θ1 is 20 degrees, and θ3 is 29 degrees. The tension T3 is 25 N. What is the tension, T1?
-a) 13.3 N.
-b) 15.3 N.
-c) 17.59 N.
-d) 20.23 N.
+e) 23.27 N.
12)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T1?
-a) 21.2 N.
-b) 25.4 N.
-c) 30.5 N.
-d) 36.6 N.
+e) 43.9 N.

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.422
+b) 0.465
-c) 0.511
-d) 0.562
-e) 0.619

14) A merry-go round has a period of 0.36 minutes. What is the minimum coefficient of static friction that would allow a 67.1 kg person to stand1.19 meters from the center, without grabbing something?

-a) 0.006
-b) 0.007
-c) 0.008
-d) 0.009
+e) 0.01

15) What is the gravitational acceleration on a plant that is 1.96 times more massive than Earth, and a radius that is 1.62 times greater than Earths?

-a) 4.8 m/s2
-b) 5.5 m/s2
-c) 6.4 m/s2
+d) 7.3 m/s2
-e) 8.4 m/s2

#### Key: Y1

1) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.422
+b) 0.465
-c) 0.511
-d) 0.562
-e) 0.619

2) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

+a) 8.3 m/s2
-b) 9.5 m/s2
-c) 11 m/s2
-d) 12.6 m/s2
-e) 14.5 m/s2

3) If you toss a coin into the air, the acceleration on the way up is

-a) up
-b) zero
+c) down

4) A car is traveling east and speeding up. The acceleration is

+a) to the east
-b) zero
-c) to the west

5) If you toss a coin into the air, the velocity while it as its highest point is

+a) zero
-b) down
-c) up

6) A sled of mass 5.1 kg is at rest on a rough surface. A string pulls with a tension of 48N at an angle of 48 degress above the horizontal. What is the magnitude of the friction?

-a) 24.29 N.
-b) 27.93 N.
+c) 32.12 N.
-d) 36.94 N.
-e) 42.48 N.

7) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 51.9 kg person to stand1.26 meters from the center, without grabbing something?

+a) 0.021
-b) 0.024
-c) 0.028
-d) 0.032
-e) 0.036
8)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T1?
+a) 32.5 N.
-b) 39 N.
-c) 46.8 N.
-d) 56.2 N.
-e) 67.4 N.

9) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 26 degrees with respect to the horizontal. What is the tension in each string?

-a) 27.4 N.
-b) 31.5 N.
-c) 36.2 N.
-d) 41.7 N.
+e) 47.9 N.

10) A sled of mass 5.8 kg is at rest on a rough surface. A string pulls with a tension of 42.5N at an angle of 51 degress above the horizontal. What is the normal force?

-a) 13.61 N.
-b) 15.66 N.
-c) 18 N.
-d) 20.71 N.
+e) 23.81 N.

11) A car is traveling west and slowing down. The acceleration is

+a) to the east
-b) zero
-c) to the west
12)
In the figure shown, θ1 is 15 degrees, and θ3 is 37 degrees. The tension T3 is 22 N. What is the tension, T1?
-a) 11.96 N.
-b) 13.75 N.
-c) 15.82 N.
+d) 18.19 N.
-e) 20.92 N.

13) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

+a) west
-b) south
-c) north
-d) east
-e) zero

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
-b) southwest
-c) northwest
-d) northeast
+e) north

15) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
-b) south
-c) northeast
-d) north
+e) southeast

#### Key: Y2

1) A sled of mass 5.3 kg is at rest on a rough surface. A string pulls with a tension of 43N at an angle of 55 degress above the horizontal. What is the normal force?

-a) 10.99 N.
-b) 12.64 N.
-c) 14.54 N.
+d) 16.72 N.
-e) 19.22 N.

2) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) north
-b) south
+c) southeast
-d) northwest
-e) northeast

3) A car is traveling east and speeding up. The acceleration is

-a) zero
-b) to the west
+c) to the east

4) A mass with weight (mg) equal to 42 newtons is suspended symmetrically from two strings. Each string makes the (same) angle of 59 degrees with respect to the horizontal. What is the tension in each string?

-a) 21.3 N.
+b) 24.5 N.
-c) 28.2 N.
-d) 32.4 N.
-e) 37.3 N.
5)
In the figure shown, θ1 is 17 degrees, and θ3 is 30 degrees. The tension T3 is 46 N. What is the tension, T1?
-a) 36.22 N.
+b) 41.66 N.
-c) 47.91 N.
-d) 55.09 N.
-e) 63.36 N.

6) If you toss a coin into the air, the acceleration on the way up is

+a) down
-b) up
-c) zero

7) A car is traveling west and slowing down. The acceleration is

-a) to the west
+b) to the east
-c) zero

8) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) southwest
-c) south
+d) north
-e) northeast

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.6N at an angle of 38 degress above the horizontal. What is the magnitude of the friction?

-a) 19.64 N.
-b) 22.59 N.
-c) 25.98 N.
-d) 29.88 N.
+e) 34.36 N.

10) A merry-go round has a period of 0.26 minutes. What is the minimum coefficient of static friction that would allow a 53.3 kg person to stand1.35 meters from the center, without grabbing something?

-a) 0.019
+b) 0.022
-c) 0.026
-d) 0.03
-e) 0.034

11) If you toss a coin into the air, the velocity while it as its highest point is

-a) up
-b) down
+c) zero

12) A car is traveling in a perfect circle at constant speed. If the car is headed north while turning west, the acceleration is

+a) west
-b) north
-c) east
-d) south
-e) zero
13)
In the figure shown, θ is 33 degrees, and the mass is 3.7 kg. What is T1?
-a) 46.5 N.
+b) 55.8 N.
-c) 67 N.
-d) 80.4 N.
-e) 96.5 N.

14) What is the gravitational acceleration on a plant that is 2.59 times more massive than Earth, and a radius that is 1.75 times greater than Earths?

+a) 8.3 m/s2
-b) 9.5 m/s2
-c) 11 m/s2
-d) 12.6 m/s2
-e) 14.5 m/s2

15) Nine barefoot baseball players, with a total mass of 672 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.59 . The net mass of the (shoed) basketball team is 407 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.295
-b) 0.325
+c) 0.357
-d) 0.393
-e) 0.432

### Key: Z0

1) If you toss a coin into the air, the velocity on the way down is

-a) up
-b) zero
+c) down

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) southwest
-c) north
+d) northwest
-e) south

3) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
-b) northeast
-c) northeast
+d) north
-e) southeast

4) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) south
-c) southwest
-d) northwest
-e) northeast

5) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) southeast
-b) northwest
-c) south
-d) north
-e) northeast

6) A car is traveling west and slowing down. The acceleration is

-a) to the west
+b) to the east
-c) zero

7) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

8) A 3.8 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.6 . In addition to the surface friction, there is also an air drag equal to 20 N. What is the magnitude (absolute value) of the acceleration?

-a) 6.4 m/s2.
-b) 7.3 m/s2.
-c) 8.4 m/s2.
-d) 9.7 m/s2.
+e) 11.1 m/s2.

9) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

10) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 19.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 2.4 m/s2?

-a) 53.7 degrees
-b) 61.8 degrees
+c) 71 degrees
-d) 81.7 degrees
-e) 93.9 degrees
11)
In the figure shown, θ is 32 degrees, and the mass is 2.8 kg. What is T2?
-a) 45.03 N.
+b) 51.78 N.
-c) 59.55 N.
-d) 68.48 N.
-e) 78.75 N.
12)
In the figure shown, θ1 is 20 degrees , and θ3 is 37 degrees . The mass has a weight of 41 N. What is the tension, T1?
-a) 29.52 N.
-b) 33.95 N.
+c) 39.04 N.
-d) 44.9 N.
-e) 51.63 N.

13) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.68 . The net mass of the (shoed) basketball team is 421 kg. What is the maximum coefficient of the barefoot boys if they lose?

-a) 0.422
+b) 0.465
-c) 0.511
-d) 0.562
-e) 0.619

14) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.44 minutes.
-b) 6.25 minutes.
+c) 7.19 minutes.
-d) 8.27 minutes.
-e) 9.51 minutes.

15) A merry-go round has a period of 0.22 minutes. What is the minimum coefficient of static friction that would allow a 96.9 kg person to stand1.95 meters from the center, without grabbing something?

-a) 0.03
-b) 0.034
-c) 0.039
+d) 0.045
-e) 0.052

#### Key: Z1

1)
In the figure shown, θ is 28 degrees, and the mass is 2.9 kg. What is T2?
+a) 60.54 N.
-b) 69.62 N.
-c) 80.06 N.
-d) 92.07 N.
-e) 105.88 N.

2) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

-a) northeast
-b) northwest
-c) southeast
-d) northeast
+e) north
3)
In the figure shown, θ1 is 20 degrees , and θ3 is 31 degrees . The mass has a weight of 36 N. What is the tension, T1?
-a) 22.7 N.
-b) 26.11 N.
-c) 30.02 N.
-d) 34.53 N.
+e) 39.71 N.

4) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.

5) A car is traveling east and slowing down. The acceleration is

-a) zero
-b) to the east
+c) to the west

6) A merry-go round has a period of 0.32 minutes. What is the minimum coefficient of static friction that would allow a 88.1 kg person to stand1.73 meters from the center, without grabbing something?

+a) 0.019
-b) 0.022
-c) 0.025
-d) 0.029
-e) 0.033

7) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.192 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.93 minutes.
+b) 6.82 minutes.
-c) 7.84 minutes.
-d) 9.02 minutes.
-e) 10.37 minutes.

8) Nine barefoot baseball players, with a total mass of 664 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.53 . The net mass of the (shoed) basketball team is 418 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.334
-b) 0.367
-c) 0.404
-d) 0.444
-e) 0.488

9) A 3.2 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.29 . In addition to the surface friction, there is also an air drag equal to 21 N. What is the magnitude (absolute value) of the acceleration?

-a) 8.2 m/s2.
+b) 9.4 m/s2.
-c) 10.8 m/s2.
-d) 12.4 m/s2.
-e) 14.3 m/s2.

10) A car is traveling west and slowing down. The acceleration is

-a) zero
-b) to the west
+c) to the east

11) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) south
-b) southwest
-c) northeast
+d) northwest
-e) north

12) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

+a) southeast
-b) north
-c) northeast
-d) northwest
-e) south

13) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up

14) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) south
-b) northeast
-c) southwest
-d) northwest
+e) north

15) A sled of mass 2.2 kg is on perfectly smooth surface. A string pulls with a tension of 17.2N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.5 m/s2?

-a) 36.3 degrees
-b) 41.7 degrees
-c) 47.9 degrees
-d) 55.1 degrees
+e) 63.4 degrees

#### Key: Z2

1) A car is traveling east and slowing down. The acceleration is

-a) to the east
+b) to the west
-c) zero

2) A merry-go-round has an angular frequency, ${\displaystyle \omega }$, equal to 0.182 rad/sec. How many minutes does it take to complete 12.5 revolutions?

-a) 5.44 minutes.
-b) 6.25 minutes.
+c) 7.19 minutes.
-d) 8.27 minutes.
-e) 9.51 minutes.

3) Nine barefoot baseball players, with a total mass of 616 kg plays tug of war against five basketball players wearing shoes that provide a static coefficient of friction of 0.71 . The net mass of the (shoed) basketball team is 388 kg. What is the maximum coefficient of the barefoot boys if they lose?

+a) 0.447
-b) 0.492
-c) 0.541
-d) 0.595
-e) 0.655

4) A sled of mass 2.6 kg is on perfectly smooth surface. A string pulls with a tension of 16.4N. At what angle above the horizontal must the string pull in order to achieve an accelerations of 3.1 m/s2?

-a) 34.6 degrees
-b) 39.8 degrees
-c) 45.8 degrees
-d) 52.7 degrees
+e) 60.6 degrees

5) A sled of mass 5.9 kg is at rest on a rough surface. A string pulls with a tension of 43.7N at an angle of 41 degress above the horizontal. What is the magnitude of the friction?

-a) 24.94 N.
-b) 28.68 N.
+c) 32.98 N.
-d) 37.93 N.
-e) 43.62 N.
6)
In the figure shown, θ1 is 20 degrees , and θ3 is 33 degrees . The mass has a weight of 31 N. What is the tension, T1?
+a) 32.55 N.
-b) 37.44 N.
-c) 43.05 N.
-d) 49.51 N.
-e) 56.94 N.

7) A 2.3 kg mass is sliding along a surface that has a kinetic coefficient of friction equal to 0.41 . In addition to the surface friction, there is also an air drag equal to 16 N. What is the magnitude (absolute value) of the acceleration?

-a) 7.2 m/s2.
-b) 8.3 m/s2.
-c) 9.5 m/s2.
+d) 11 m/s2.
-e) 12.6 m/s2.

8) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The acceleration vector points

-a) northeast
-b) north
-c) southwest
-d) south
+e) northwest

9) A car is headed due north and increasing its speed. It is also turning right because it is also traveling in a perfect circle. The velocity vector points

-a) northwest
+b) north
-c) southwest
-d) northeast
-e) south

10) If you toss a coin into the air, the velocity on the way down is

+a) down
-b) zero
-c) up
11)
In the figure shown, θ is 37 degrees, and the mass is 2.5 kg. What is T2?
-a) 30.78 N.
-b) 35.4 N.
+c) 40.71 N.
-d) 46.82 N.
-e) 53.84 N.

12) A car is headed due north and decreasing its speed. It is also turning right because it is also traveling in a perfect circle. The acceleration vector points

-a) northwest
+b) southeast
-c) north
-d) south
-e) northeast

13) A car is traveling west and slowing down. The acceleration is

-a) zero
-b) to the west
+c) to the east

14) A car is headed due north and increasing its speed. It is also turning left because it is also traveling in a perfect circle. The velocity vector points

+a) north
-b) northwest
-c) northeast
-d) northeast
-e) southeast

15) A merry-go round has a period of 0.38 minutes. What is the minimum coefficient of static friction that would allow a 64.8 kg person to stand1.76 meters from the center, without grabbing something?

-a) 0.008
-b) 0.009
-c) 0.01
-d) 0.012
+e) 0.014