# Wright State University Lake Campus/2016-9/Phy1110/Sample exams

pht20160713T110054

This identifier represents a unique rendition of the course *pht*. It contains 2 versions that are identical except for numerical values and order of questions and answers in test. For more information visit Quizbank.

### pht:T1:V1

[edit | edit source]1) A car traveling at 38.9 mph increases its speed to 43.7 mph in 3 seconds. What is the average acceleration?

- a) 2.26 x 10
^{-1}m/s^{2} - b) 4.02 x 10
^{-1}m/s^{2} - c) 7.15 x 10
^{-1}m/s^{2} - d) 1.27 x 10
^{0}m/s^{2} - e) 2.26 x 10
^{0}m/s^{2}

2) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

- a) 20.0 meters
- b) 17.0 meters
- c) 19.0 meters
- d) 16.0 meters
- e) 18.0 meters

3) The Smith family got in trouble for having fun on a high speed train travelling at 48.1 m/s. Mr. Smith is charged with having fired a pellet gun at his daughter (directly across the isle) with a bullet that had a speed of 92.7 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

- a) 38.2 m/s.
- b) 45.9 m/s.
- c) 55 m/s.
- d) 66 m/s.
- e) 79.2 m/s.

4) A car traveling at 42.8 miles/hour stops in 7.5 seconds. What is the average acceleration?

- a) 8.07 x 10
^{-1}m/s^{2} - b) 1.43 x 10
^{0}m/s^{2} - c) 2.55 x 10
^{0}m/s^{2} - d) 4.54 x 10
^{0}m/s^{2} - e) 8.07 x 10
^{0}m/s^{2}

5) A particle accelerates uniformly at 16 m/s/s. How long does it take for the velocity to increase from 981 m/s to 1816 m/s?

- a) 30.2 s
- b) 36.24 s
- c) 43.49 s
- d) 52.19 s
- e) 62.63 s

6) What is the acceleration if a car travelling at 9.8 m/s makes a skid mark that is 7.25 m long before coming to rest? (Assume uniform acceleration.)

- a) 3.83m/s/2.
- b) 4.6m/s/2.
- c) 5.52m/s/2.
- d) 6.62m/s/2.
- e) 7.95m/s/2.

7) The Smith family is having fun on a high speed train travelling at 42.3 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 25.2 m/s at Mrs. Smith who is at the front of the train. What is the speed of the bullet with respect to Earth?

- a) 30 m/s.
- b) 45 m/s.
- c) 67.5 m/s.
- d) 101.3 m/s.
- e) 151.9 m/s.

8) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 6.1 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.79 m, and moves at a constant speed of 2.87 m/s in the +y direction. At what time do they meet?

- a) 0.43 s.
- b) 0.52 s.
- c) 0.62 s.
- d) 0.75 s.
- e) 0.9 s.

9) A ball is kicked horizontally from a height of 2.6 m, at a speed of 7.7m/s. How far does it travel before landing?

- a) 4.67 m.
- b) 5.61 m.
- c) 6.73 m.
- d) 8.08 m.
- e) 9.69 m.

10) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- a) 9.0 meters
- b) 10.0 meters
- c) 12.0 meters
- d) 11.0 meters
- e) 8.0 meters

11) A train accelerates uniformly from 15.75 m/s to 30.375 m/s, while travelling a distance of 357 m. What is the 'average' acceleration?

- a) 0.55m/s/s.
- b) 0.66m/s/s.
- c) 0.79m/s/s.
- d) 0.94m/s/s.
- e) 1.13m/s/s.

12) Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

- a) 20.0 meters
- b) 19.0 meters
- c) 21.0 meters
- d) 23.0 meters
- e) 22.0 meters

13) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

- a) 27.0 meters
- b) 24.0 meters
- c) 23.0 meters
- d) 25.0 meters
- e) 26.0 meters

14) A particle is initially at the origin and moving in the x direction at a speed of 3.9 m/s. It has an constant acceleration of 1.9 m/s^{2} in the y direction, as well as an acceleration of 0.5 in the x direction. What angle does the velocity make with the x axis at time t = 2.5 s?

- a) 37.12 degrees.
- b) 42.69 degrees.
- c) 49.09 degrees.
- d) 56.45 degrees.
- e) 64.92 degrees.

15) Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- a) 11.0 meters
- b) 9.0 meters
- c) 8.0 meters
- d) 12.0 meters
- e) 10.0 meters

#### KEY:pht:T1:V1

[edit | edit source]pht20160713T110054

1) A car traveling at 32.9 mph increases its speed to 35.1 mph in 4.6 seconds. What is the average acceleration?

- +a) 2.14 x 10
^{-1}m/s^{2} - -b) 3.8 x 10
^{-1}m/s^{2} - -c) 6.76 x 10
^{-1}m/s^{2} - -d) 1.2 x 10
^{0}m/s^{2} - -e) 2.14 x 10
^{0}m/s^{2}

2) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

- +a) 16.0 meters
- -b) 18.0 meters
- -c) 20.0 meters
- -d) 17.0 meters
- -e) 19.0 meters

3) The Smith family got in trouble for having fun on a high speed train travelling at 47.6 m/s. Mr. Smith is charged with having fired a pellet gun at his daughter (directly across the isle) with a bullet that had a speed of 97 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

- -a) 40.8 m/s.
- -b) 48.9 m/s.
- -c) 58.7 m/s.
- -d) 70.4 m/s.
- +e) 84.5 m/s.

4) A car traveling at 38.1 miles/hour stops in 2.1 seconds. What is the average acceleration?

- -a) 4.56 x 10
^{0}m/s^{2} - +b) 8.11 x 10
^{0}m/s^{2} - -c) 1.44 x 10
^{1}m/s^{2} - -d) 2.56 x 10
^{1}m/s^{2} - -e) 4.56 x 10
^{1}m/s^{2}

5) A particle accelerates uniformly at 10.75 m/s/s. How long does it take for the velocity to increase from 1184 m/s to 2001 m/s?

- -a) 43.98 s
- -b) 52.78 s
- -c) 63.33 s
- +d) 76 s
- -e) 91.2 s

6) What is the acceleration if a car travelling at 7.85 m/s makes a skid mark that is 6.25 m long before coming to rest? (Assume uniform acceleration.)

- -a) 3.42m/s
^{2}. - -b) 4.11m/s
^{2}. - +c) 4.93m/s
^{2}. - -d) 5.92m/s
^{2}. - -e) 7.1m/s
^{2}.

7) The Smith family is having fun on a high speed train travelling at 47.6 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 28.1 m/s at Mrs. Smith who is at the front of the train. What is the speed of the bullet with respect to Earth?

- -a) 15 m/s.
- -b) 22.4 m/s.
- -c) 33.6 m/s.
- -d) 50.5 m/s.
- +e) 75.7 m/s.

8) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 7.34 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.22 m, and moves at a constant speed of 2.91 m/s in the +y direction. At what time do they meet?

- -a) 0.23 s.
- -b) 0.27 s.
- +c) 0.33 s.
- -d) 0.4 s.
- -e) 0.47 s.

9) A ball is kicked horizontally from a height of 2.6 m, at a speed of 7.7m/s. How far does it travel before landing?

- -a) 4.67 m.
- +b) 5.61 m.
- -c) 6.73 m.
- -d) 8.08 m.
- -e) 9.69 m.

10) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- -a) 11.0 meters
- -b) 10.0 meters
- +c) 12.0 meters
- -d) 9.0 meters
- -e) 8.0 meters

11) A train accelerates uniformly from 17 m/s to 35.25 m/s, while travelling a distance of 151 m. What is the 'average' acceleration?

- -a) 1.83m/s/s.
- -b) 2.19m/s/s.
- -c) 2.63m/s/s.
- +d) 3.16m/s/s.
- -e) 3.79m/s/s.

12) Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

- -a) 21.0 meters
- -b) 22.0 meters
- +c) 20.0 meters
- -d) 19.0 meters
- -e) 23.0 meters

13) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

- +a) 24.0 meters
- -b) 27.0 meters
- -c) 25.0 meters
- -d) 23.0 meters
- -e) 26.0 meters

14) A particle is initially at the origin and moving in the x direction at a speed of 4 m/s. It has an constant acceleration of 1.8 m/s^{2} in the y direction, as well as an acceleration of 0.6 in the x direction. What angle does the velocity make with the x axis at time t = 2.7 s?

- +a) 40.85 degrees.
- -b) 46.98 degrees.
- -c) 54.03 degrees.
- -d) 62.13 degrees.
- -e) 71.45 degrees.

15) Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- +a) 9.0 meters
- -b) 8.0 meters
- -c) 12.0 meters
- -d) 10.0 meters
- -e) 11.0 meters

### pht:T1:V2

[edit | edit source]1) A particle is initially at the origin and moving in the x direction at a speed of 3.7 m/s. It has an constant acceleration of 1.5 m/s^{2} in the y direction, as well as an acceleration of 0.6 in the x direction. What angle does the velocity make with the x axis at time t = 2.1 s?

- a) 21.32 degrees.
- b) 24.51 degrees.
- c) 28.19 degrees.
- d) 32.42 degrees.
- e) 37.28 degrees.

2) A car traveling at 77.8 miles/hour stops in 6.4 seconds. What is the average acceleration?

- a) 3.06 x 10
^{0}m/s^{2} - b) 5.43 x 10
^{0}m/s^{2} - c) 9.66 x 10
^{0}m/s^{2} - d) 1.72 x 10
^{1}m/s^{2} - e) 3.06 x 10
^{1}m/s^{2}

3) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

- a) 16.0 meters
- b) 20.0 meters
- c) 19.0 meters
- d) 17.0 meters
- e) 18.0 meters

4) What is the acceleration if a car travelling at 7.7 m/s makes a skid mark that is 7 m long before coming to rest? (Assume uniform acceleration.)

- a) 4.24m/s
^{2}. - b) 5.08m/s
^{2}. - c) 6.1m/s
^{2}. - d) 7.32m/s
^{2}. - e) 8.78m/s
^{2}.

5) The Smith family got in trouble for having fun on a high speed train travelling at 48.1 m/s. Mr. Smith is charged with having fired a pellet gun at his daughter (directly across the isle) with a bullet that had a speed of 92.7 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

- a) 38.2 m/s.
- b) 45.9 m/s.
- c) 55 m/s.
- d) 66 m/s.
- e) 79.2 m/s.

6) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 5.86 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.46 m, and moves at a constant speed of 2.23 m/s in the +y direction. At what time do they meet?

- a) 0.45 s.
- b) 0.54 s.
- c) 0.65 s.
- d) 0.78 s.
- e) 0.94 s.

7) A particle accelerates uniformly at 16 m/s/s. How long does it take for the velocity to increase from 981 m/s to 1816 m/s?

- a) 30.2 s
- b) 36.24 s
- c) 43.49 s
- d) 52.19 s
- e) 62.63 s

8) Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

- a) 20.0 meters
- b) 22.0 meters
- c) 23.0 meters
- d) 21.0 meters
- e) 19.0 meters

9) A train accelerates uniformly from 17 m/s to 35.25 m/s, while travelling a distance of 151 m. What is the 'average' acceleration?

- a) 1.83m/s/s.
- b) 2.19m/s/s.
- c) 2.63m/s/s.
- d) 3.16m/s/s.
- e) 3.79m/s/s.

10) A car traveling at 29.4 mph increases its speed to 32.7 mph in 5.3 seconds. What is the average acceleration?

- a) 8.8 x 10
^{-2}m/s^{2} - b) 1.57 x 10
^{-1}m/s^{2} - c) 2.78 x 10
^{-1}m/s^{2} - d) 4.95 x 10
^{-1}m/s^{2} - e) 8.8 x 10
^{-1}m/s^{2}

11) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

- a) 24.0 meters
- b) 27.0 meters
- c) 25.0 meters
- d) 26.0 meters
- e) 23.0 meters

12) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- a) 9.0 meters
- b) 12.0 meters
- c) 10.0 meters
- d) 8.0 meters
- e) 11.0 meters

13) Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- a) 10.0 meters
- b) 9.0 meters
- c) 8.0 meters
- d) 11.0 meters
- e) 12.0 meters

14) A ball is kicked horizontally from a height of 3 m, at a speed of 10m/s. How far does it travel before landing?

- a) 6.52 m.
- b) 7.82 m.
- c) 9.39 m.
- d) 11.27 m.
- e) 13.52 m.

15) The Smith family is having fun on a high speed train travelling at 47.6 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 28.1 m/s at Mrs. Smith who is at the front of the train. What is the speed of the bullet with respect to Earth?

- a) 15 m/s.
- b) 22.4 m/s.
- c) 33.6 m/s.
- d) 50.5 m/s.
- e) 75.7 m/s.

#### KEY:pht:T1:V2

[edit | edit source]pht20160713T110054

1) A particle is initially at the origin and moving in the x direction at a speed of 4.1 m/s. It has an constant acceleration of 2.3 m/s^{2} in the y direction, as well as an acceleration of 0.5 in the x direction. What angle does the velocity make with the x axis at time t = 2.7 s?

- -a) 32.04 degrees.
- -b) 36.85 degrees.
- -c) 42.37 degrees.
- +d) 48.73 degrees.
- -e) 56.04 degrees.

2) A car traveling at 42.8 miles/hour stops in 7.5 seconds. What is the average acceleration?

- -a) 8.07 x 10
^{-1}m/s^{2} - -b) 1.43 x 10
^{0}m/s^{2} - +c) 2.55 x 10
^{0}m/s^{2} - -d) 4.54 x 10
^{0}m/s^{2} - -e) 8.07 x 10
^{0}m/s^{2}

3) Mr. Smith starts at rest and accelerates to a speed of 2 m/s, in 6 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 4 seconds to come to rest. How far did he travel?

- +a) 16.0 meters
- -b) 17.0 meters
- -c) 19.0 meters
- -d) 20.0 meters
- -e) 18.0 meters

4) What is the acceleration if a car travelling at 7.85 m/s makes a skid mark that is 6.25 m long before coming to rest? (Assume uniform acceleration.)

- -a) 3.42m/s
^{2}. - -b) 4.11m/s
^{2}. - +c) 4.93m/s
^{2}. - -d) 5.92m/s
^{2}. - -e) 7.1m/s
^{2}.

5) The Smith family got in trouble for having fun on a high speed train travelling at 48.4 m/s. Mr. Smith is charged with having fired a pellet gun at his daughter (directly across the isle) with a bullet that had a speed of 89.1 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

- +a) 74.8 m/s.
- -b) 89.8 m/s.
- -c) 107.7 m/s.
- -d) 129.3 m/s.
- -e) 155.1 m/s.

6) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 6.76 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.65 m, and moves at a constant speed of 2.8 m/s in the +y direction. At what time do they meet?

- -a) 0.21 s.
- -b) 0.25 s.
- -c) 0.3 s.
- -d) 0.36 s.
- +e) 0.43 s.

7) A particle accelerates uniformly at 17.25 m/s/s. How long does it take for the velocity to increase from 761 m/s to 1698 m/s?

- -a) 45.27 s
- +b) 54.32 s
- -c) 65.18 s
- -d) 78.22 s
- -e) 93.86 s

8) Mr. Smith starts at rest and accelerates to a speed of 4 m/s, in 2 seconds. He then travels at this speed for an additional 3 seconds. Then he decelerates uniformly, taking 2 seconds to come to rest. How far did he travel?

- -a) 19.0 meters
- -b) 22.0 meters
- -c) 23.0 meters
- +d) 20.0 meters
- -e) 21.0 meters

9) A train accelerates uniformly from 10 m/s to 18.75 m/s, while travelling a distance of 263 m. What is the 'average' acceleration?

- -a) 0.28m/s/s.
- -b) 0.33m/s/s.
- -c) 0.4m/s/s.
- +d) 0.48m/s/s.
- -e) 0.57m/s/s.

10) A car traveling at 38.9 mph increases its speed to 43.7 mph in 3 seconds. What is the average acceleration?

- -a) 2.26 x 10
^{-1}m/s^{2} - -b) 4.02 x 10
^{-1}m/s^{2} - +c) 7.15 x 10
^{-1}m/s^{2} - -d) 1.27 x 10
^{0}m/s^{2} - -e) 2.26 x 10
^{0}m/s^{2}

11) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 4 seconds. How far did he travel?

- -a) 27.0 meters
- -b) 23.0 meters
- -c) 26.0 meters
- -d) 25.0 meters
- +e) 24.0 meters

12) Mr. Smith is driving at a speed of 7 m/s, when he slows down to a speed of 5 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- -a) 11.0 meters
- -b) 9.0 meters
- -c) 10.0 meters
- -d) 8.0 meters
- +e) 12.0 meters

13) Mr. Smith is driving at a speed of 5 m/s, when he slows down to a speed of 4 m/s, when he hits a wall at this speed, after travelling for 2 seconds. How far did he travel?

- +a) 9.0 meters
- -b) 12.0 meters
- -c) 10.0 meters
- -d) 11.0 meters
- -e) 8.0 meters

14) A ball is kicked horizontally from a height of 2.8 m, at a speed of 7.9m/s. How far does it travel before landing?

- -a) 3.46 m.
- -b) 4.15 m.
- -c) 4.98 m.
- +d) 5.97 m.
- -e) 7.17 m.

15) The Smith family is having fun on a high speed train travelling at 48.1 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 21.1 m/s at Mrs. Smith who is at the front of the train. What is the speed of the bullet with respect to Earth?

- -a) 13.7 m/s.
- -b) 20.5 m/s.
- -c) 30.8 m/s.
- -d) 46.1 m/s.
- +e) 69.2 m/s.

### pht:T2:V1

[edit | edit source]1) 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

2) 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

*mass*is 2.9 kg. What is T

_{2}?

- a) 60.54 N.
- b) 69.62 N.
- c) 80.06 N.
- d) 92.07 N.
- e) 105.88 N.

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) north
- c) southwest
- d) northwest
- e) south

5) 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) north
- d) south
- e) zero

_{1}= 6.7 kg, m

_{2}= 2.5 kg, and F

_{ext}= 101 N), what is the acceleration? Assume no friction is present.

- a) 6.3 m/s
^{2} - b) 7.2 m/s
^{2} - c) 8.3 m/s
^{2} - d) 9.5 m/s
^{2} - e) 11 m/s
^{2}

7) 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

8) 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/s^{2}?

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

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

- a) down
- b) up
- c) zero

10) 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) northeast
- d) south
- e) southwest

11) What is the gravitational acceleration on a plant that is 2.13 times more massive than Earth, and a radius that is 1.31 times greater than Earths?

- a) 8 m/s
^{2} - b) 9.2 m/s
^{2} - c) 10.6 m/s
^{2} - d) 12.2 m/s
^{2} - e) 14 m/s
^{2}

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

- a) down
- b) up
- c) zero

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

- a) zero
- b) down
- c) up

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

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

_{1}is 17 degrees , and θ

_{3}is 29 degrees . The mass has a

*weight*of 29 N. What is the tension, T

_{1}?

- a) 20.16 N.
- b) 23.18 N.
- c) 26.66 N.
- d) 30.66 N.
- e) 35.26 N.

#### KEY:pht:T2:V1

[edit | edit source]pht20160713T110054

1) 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

2) 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

*mass*is 2.5 kg. What is T

_{2}?

- -a) 30.78 N.
- -b) 35.4 N.
- +c) 40.71 N.
- -d) 46.82 N.
- -e) 53.84 N.

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) north
- +d) northeast
- -e) southwest

5) 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) north
- -c) south
- -d) zero
- -e) west

_{1}= 5.4 kg, m

_{2}= 3.9 kg, and F

_{ext}= 136 N), what is the acceleration? Assume no friction is present.

- -a) 12.7 m/s
^{2} - +b) 14.6 m/s
^{2} - -c) 16.8 m/s
^{2} - -d) 19.3 m/s
^{2} - -e) 22.2 m/s
^{2}

7) A mass with weight (mg) 6.8 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 2.5 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

- -a) 0.19
- -b) 0.23
- -c) 0.27
- -d) 0.33
- +e) 0.39

8) 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/s^{2}?

- +a) 74 degrees
- -b) 85.1 degrees
- -c) 97.8 degrees
- -d) 112.5 degrees
- -e) 129.4 degrees

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

- -a) zero
- -b) up
- +c) down

10) 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

11) 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/s
^{2} - -b) 4.7 m/s
^{2} - -c) 5.4 m/s
^{2} - -d) 6.2 m/s
^{2} - +e) 7.2 m/s
^{2}

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

- -a) up
- +b) zero
- -c) down

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

- -a) zero
- -b) up
- +c) down

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

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

_{1}is 20 degrees , and θ

_{3}is 37 degrees . The mass has a

*weight*of 41 N. What is the tension, T

_{1}?

- -a) 29.52 N.
- -b) 33.95 N.
- +c) 39.04 N.
- -d) 44.9 N.
- -e) 51.63 N.

### pht:T2:V2

[edit | edit source]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 acceleration vector points

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

2) 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/s
^{2} - b) 5.4 m/s
^{2} - c) 6.2 m/s
^{2} - d) 7.2 m/s
^{2} - e) 8.3 m/s
^{2}

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

4) 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

_{1}= 5.1 kg, m

_{2}= 3.5 kg, and F

_{ext}= 135 N), what is the acceleration? Assume no friction is present.

- a) 13.7 m/s
^{2} - b) 15.7 m/s
^{2} - c) 18.1 m/s
^{2} - d) 20.8 m/s
^{2} - e) 23.9 m/s
^{2}

6) 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

_{1}is 17 degrees , and θ

_{3}is 39 degrees . The mass has a

*weight*of 42 N. What is the tension, T

_{1}?

- a) 34.24 N.
- b) 39.37 N.
- c) 45.28 N.
- d) 52.07 N.
- e) 59.88 N.

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

- a) down
- b) up
- c) zero

9) A mass with weight (mg) 11 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 2.77 newtons. If this is the maximum force before the block starts to move, what is the static coefficient of friction?

- a) 0.12
- b) 0.14
- c) 0.17
- d) 0.21
- e) 0.25

10) 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) northeast
- c) southwest
- d) northwest
- e) south

*mass*is 2.9 kg. What is T

_{2}?

- a) 60.54 N.
- b) 69.62 N.
- c) 80.06 N.
- d) 92.07 N.
- e) 105.88 N.

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 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/s^{2}?

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

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

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

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

- a) down
- b) zero
- c) up

#### KEY:pht:T2:V2

[edit | edit source]pht20160713T110054

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 acceleration vector points

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

2) 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/s
^{2} - -b) 5.5 m/s
^{2} - -c) 6.4 m/s
^{2} - +d) 7.3 m/s
^{2} - -e) 8.4 m/s
^{2}

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) north
- -b) west
- +c) east
- -d) zero
- -e) south

4) 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

_{1}= 6.5 kg, m

_{2}= 2.5 kg, and F

_{ext}= 141 N), what is the acceleration? Assume no friction is present.

- -a) 9 m/s
^{2} - -b) 10.3 m/s
^{2} - -c) 11.8 m/s
^{2} - -d) 13.6 m/s
^{2} - +e) 15.7 m/s
^{2}

6) 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

_{1}is 17 degrees , and θ

_{3}is 29 degrees . The mass has a

*weight*of 29 N. What is the tension, T

_{1}?

- -a) 20.16 N.
- -b) 23.18 N.
- -c) 26.66 N.
- -d) 30.66 N.
- +e) 35.26 N.

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

- +a) zero
- -b) down
- -c) up

9) 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

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

*mass*is 2.7 kg. What is T

_{2}?

- -a) 36.74 N.
- -b) 42.25 N.
- +c) 48.58 N.
- -d) 55.87 N.
- -e) 64.25 N.

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

- -a) zero
- -b) up
- +c) down

13) 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/s^{2}?

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

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

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

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

- +a) down
- -b) zero
- -c) up

### pht:T3:V1

[edit | edit source]1) A car of mass 796 kg is driving on an icy road at a speed of 18 m/s, when it collides with a stationary truck. After the collision they stick and move at a speed of 5.9 m/s. What was the mass of the truck?

- a) 1134 kg
- b) 1360 kg
- c) 1632 kg
- d) 1959 kg
- e) 2351 kg

- a) Yes
- b) No

3) You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 4.9m/s, when you encounter a hill of height 1.14m. What is your speed at the top of the hill?

- a) 1.218 m/s
- b) 1.291 m/s
- c) 1.368 m/s
- d) 1.450 m/s
- e) 1.537 m/s

_{1}= 6.1m, L

_{2}= 4.8m and L

_{3}= 7.2m. What is F

_{2}if F

_{1}=0.72N and F

_{3}=0.1N?

- a) 6.31E-01 N
- b) 7.65E-01 N
- c) 9.27E-01 N
- d) 1.12E+00 N
- e) 1.36E+00 N

- a) 3.20E+01 N
- b) 3.87E+01 N
- c) 4.69E+01 N
- d) 5.69E+01 N
- e) 6.89E+01 N

- a) No
- b) Yes

- a) 1.72 m
- b) 1.84 m
- c) 1.96 m
- d) 2.10 m
- e) 2.25 m

- a) 4.00E+01 N
- b) 4.85E+01 N
- c) 5.87E+01 N
- d) 7.11E+01 N
- e) 8.62E+01 N

9) On object of mass 2.3 kg that is moving at a velocity of 22m/s collides with a stationary object of mass 19.8 kg. What is the final velocity if they stick? (Assume no external friction.)

- a) 1.32m/s.
- b) 1.59m/s.
- c) 1.91m/s.
- d) 2.29m/s.
- e) 2.75m/s.

- a) 1.33E+02 m
- b) 1.40E+02 m
- c) 1.47E+02 m
- d) 1.54E+02 m
- e) 1.62E+02 m

#### KEY:pht:T3:V1

[edit | edit source]pht20160713T110054

1) A car of mass 654 kg is driving on an icy road at a speed of 15 m/s, when it collides with a stationary truck. After the collision they stick and move at a speed of 5.7 m/s. What was the mass of the truck?

- -a) 741 kg
- -b) 889 kg
- +c) 1067 kg
- -d) 1280 kg
- -e) 1537 kg

- -a) No
- +b) Yes

3) You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 4.9m/s, when you encounter a hill of height 1.14m. What is your speed at the top of the hill?

- + a) 1.291 m/s
- - b) 1.368 m/s
- - c) 1.450 m/s
- - d) 1.537 m/s
- - e) 1.630 m/s

_{1}= 6.1m, L

_{2}= 4m and L

_{3}= 7.5m. What is F

_{2}if F

_{1}=0.74N and F

_{3}=0N?

- -a) 6.35E-01 N
- -b) 7.69E-01 N
- -c) 9.31E-01 N
- +d) 1.13E+00 N
- -e) 1.37E+00 N

- -a) 1.47E+01 N
- +b) 1.78E+01 N
- -c) 2.16E+01 N
- -d) 2.62E+01 N
- -e) 3.17E+01 N

- +a) No
- -b) Yes

- + a) 2.47 m
- - b) 2.65 m
- - c) 2.83 m
- - d) 3.03 m
- - e) 3.24 m

- -a) 4.00E+01 N
- -b) 4.85E+01 N
- -c) 5.87E+01 N
- -d) 7.12E+01 N
- +e) 8.62E+01 N

9) On object of mass 2.3 kg that is moving at a velocity of 22m/s collides with a stationary object of mass 19.8 kg. What is the final velocity if they stick? (Assume no external friction.)

- -a) 1.32m/s.
- -b) 1.59m/s.
- -c) 1.91m/s.
- +d) 2.29m/s.
- -e) 2.75m/s.

- - a) 4.56E+02 m
- + b) 4.79E+02 m
- - c) 5.03E+02 m
- - d) 5.28E+02 m
- - e) 5.54E+02 m

### pht:T3:V2

[edit | edit source]- a) 1.92 m
- b) 2.06 m
- c) 2.20 m
- d) 2.35 m
- e) 2.52 m

2) A car of mass 796 kg is driving on an icy road at a speed of 18 m/s, when it collides with a stationary truck. After the collision they stick and move at a speed of 5.9 m/s. What was the mass of the truck?

- a) 1134 kg
- b) 1360 kg
- c) 1632 kg
- d) 1959 kg
- e) 2351 kg

_{1}= 6.1m, L

_{2}= 4m and L

_{3}= 7.5m. What is F

_{2}if F

_{1}=0.74N and F

_{3}=0N?

- a) 6.35E-01 N
- b) 7.69E-01 N
- c) 9.31E-01 N
- d) 1.13E+00 N
- e) 1.37E+00 N

4) You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 4.9m/s, when you encounter a hill of height 1.14m. What is your speed at the top of the hill?

- a) 1.022 m/s
- b) 1.084 m/s
- c) 1.149 m/s
- d) 1.218 m/s
- e) 1.291 m/s

- a) No
- b) Yes

- a) 6.83E+00 N
- b) 8.28E+00 N
- c) 1.00E+01 N
- d) 1.21E+01 N
- e) 1.47E+01 N

- a) 9.31E+01 N
- b) 1.13E+02 N
- c) 1.37E+02 N
- d) 1.65E+02 N
- e) 2.01E+02 N

8) On object of mass 2.9 kg that is moving at a velocity of 21m/s collides with a stationary object of mass 12.6 kg. What is the final velocity if they stick? (Assume no external friction.)

- a) 3.93m/s.
- b) 4.71m/s.
- c) 5.66m/s.
- d) 6.79m/s.
- e) 8.15m/s.

- a) 1.66E+03 m
- b) 1.74E+03 m
- c) 1.83E+03 m
- d) 1.92E+03 m
- e) 2.01E+03 m

- a) No
- b) Yes

#### KEY:pht:T3:V2

[edit | edit source]pht20160713T110054

- - a) 2.39 m
- - b) 2.56 m
- - c) 2.74 m
- + d) 2.93 m
- - e) 3.14 m

2) A car of mass 571 kg is driving on an icy road at a speed of 24 m/s, when it collides with a stationary truck. After the collision they stick and move at a speed of 5.5 m/s. What was the mass of the truck?

- -a) 1334 kg
- -b) 1601 kg
- +c) 1921 kg
- -d) 2305 kg
- -e) 2766 kg

_{1}= 5.2m, L

_{2}= 4.5m and L

_{3}= 8.6m. What is F

_{2}if F

_{1}=0.86N and F

_{3}=0.1N?

- -a) 3.73E-01 N
- -b) 4.51E-01 N
- -c) 5.47E-01 N
- -d) 6.63E-01 N
- +e) 8.03E-01 N

4) You are riding a bicycle on a flat road. Assume no friction or air drag, and that you are coasting. Your speed is 4.9m/s, when you encounter a hill of height 1.14m. What is your speed at the top of the hill?

- - a) 1.149 m/s
- - b) 1.218 m/s
- + c) 1.291 m/s
- - d) 1.368 m/s
- - e) 1.450 m/s

- +a) Yes
- -b) No

- +a) 2.44E+01 N
- -b) 2.96E+01 N
- -c) 3.59E+01 N
- -d) 4.34E+01 N
- -e) 5.26E+01 N

- +a) 7.06E+01 N
- -b) 8.56E+01 N
- -c) 1.04E+02 N
- -d) 1.26E+02 N
- -e) 1.52E+02 N

8) On object of mass 2.6 kg that is moving at a velocity of 23m/s collides with a stationary object of mass 18.17 kg. What is the final velocity if they stick? (Assume no external friction.)

- +a) 2.88m/s.
- -b) 3.45m/s.
- -c) 4.15m/s.
- -d) 4.98m/s.
- -e) 5.97m/s.

- - a) 1.66E+03 m
- - b) 1.74E+03 m
- - c) 1.83E+03 m
- + d) 1.92E+03 m
- - e) 2.01E+03 m

- -a) Yes
- +b) No

### pht:T4:V1

[edit | edit source]1) A window is square, with a length of each side equal to 0.93 meters. The glass has a thickness of 15 mm. To decrease the heat loss, you reduce the size of the window by decreasing the length of each side by a factor of 1.55. You also increase the thickness of the glass by a factor of 2.54. If the inside and outside temperatures are unchanged, by what factor have you decreased the heat flow?. By what factor have you decreased the heat flow (assuming the same inside and outside temperatures).

- a) 4.16 x 10
^{0}unit - b) 5.04 x 10
^{0}unit - c) 6.1 x 10
^{0}unit - d) 7.39 x 10
^{0}unit - e) 8.96 x 10
^{0}unit

2) What is the rms speed of a molecule with an atomic mass of 14 if the temperature is 10 degrees Fahrenheit?

- a) 3.16 x 10
^{2}m/s - b) 3.83 x 10
^{2}m/s - c) 4.65 x 10
^{2}m/s - d) 5.63 x 10
^{2}m/s - e) 6.82 x 10
^{2}m/s

3) A cylinder with a radius of 0.31 m and a length of 3.5 m is held so that the top circular face is 4.8 m below the water. The mass of the block is 933.0 kg. The mass density of water is 1000kg/m^3. What is the pressure at the top face of the cylinder?

- 3.88E4 Pa
- 4.70E4 Pa
- 5.70E4 Pa
- 6.90E4 Pa
- 8.37E4 Pa

4) A 9.2 cm diameter pipe can fill a 1.6 m^3 volume in 8.0 minutes. Before exiting the pipe, the diameter is reduced to 4.0 cm (with no loss of flow rate). What is the speed in the first (wider) pipe?

- a) 5.01E-1 m/s
- b) 6.08E-1 m/s
- c) 7.36E-1 m/s
- d) 8.92E-1 m/s
- e) 1.08E0 m/s

5) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.99 kg is filled with 0.26 kg of water. What fraction of the heat went into the aluminum?

- a) 2.7 x 10
^{-1} - b) 3.2 x 10
^{-1} - c) 3.8 x 10
^{-1} - d) 4.5 x 10
^{-1} - e) 5.3 x 10
^{-1}

6) A car with a tire radius of 0.21 m accelerates from 0 to 26 m/s in 11.1 seconds. What is the angular acceleration of the wheel?

- a) 9.21 x 10
^{0}m - b) 1.12 x 10
^{1}m - c) 1.35 x 10
^{1}m - d) 1.64 x 10
^{1}m - e) 1.98 x 10
^{1}m

7) A lead filled bicycle wheel of radius 0.41 m and mass 2.9 kg is rotating at a frequency of 1.7 revolutions per second. What is the total kinetic energy if the wheel is rolling about a stationary axis?

- a) 2.78 x 10
^{1}J - b) 3.37 x 10
^{1}J - c) 4.08 x 10
^{1}J - d) 4.95 x 10
^{1}J - e) 5.99 x 10
^{1}J

_{1}= 1.1 kPa, P

_{2}= 3.5 kPa. The volumes are V

_{1}= 1.2m

^{3}and V

_{4}= 2.5m

^{3}. How much work is involved between 1 and 4?

- a) 1.43 x 10
^{1}J - b) 4.52 x 10
^{1}J - c) 1.43 x 10
^{2}J - d) 4.52 x 10
^{2}J - e) 1.43 x 10
^{3}J

_{1}= 1.4 kPa, P

_{2}= 4.1 kPa. The volumes are V

_{1}= 2.1m

^{3}and V

_{4}= 4.7m

^{3}. What is the temperature at step 4?

- a) 1.79 x 10
^{2}K - b) 5.65 x 10
^{2}K - c) 1.79 x 10
^{3}K - d) 5.65 x 10
^{3}K - e) 1.79 x 10
^{4}K

10) A cylinder with a radius of 0.33 m and a length of 2.9 m is held so that the top circular face is 4.1 m below the water. The mass of the block is 912.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the water at the top surface?

- 6.89E3 N
- 8.67E3 N
- 1.09E4 N
- 1.37E4 N
- 1.73E4 N

#### KEY:pht:T4:V1

[edit | edit source]pht20160713T110054

1) A window is square, with a length of each side equal to 0.81 meters. The glass has a thickness of 13 mm. To decrease the heat loss, you reduce the size of the window by decreasing the length of each side by a factor of 1.24. You also increase the thickness of the glass by a factor of 2.15. If the inside and outside temperatures are unchanged, by what factor have you decreased the heat flow?. By what factor have you decreased the heat flow (assuming the same inside and outside temperatures).

- -a) 1.53 x 10
^{0}unit - -b) 1.86 x 10
^{0}unit - -c) 2.25 x 10
^{0}unit - -d) 2.73 x 10
^{0}unit - +e) 3.31 x 10
^{0}unit

2) What is the rms speed of a molecule with an atomic mass of 17 if the temperature is 7 degrees Fahrenheit?

- -a) 4.2 x 10
^{2}m/s - -b) 5.09 x 10
^{2}m/s - +c) 6.17 x 10
^{2}m/s - -d) 7.47 x 10
^{2}m/s - -e) 9.05 x 10
^{2}m/s

3) A cylinder with a radius of 0.38 m and a length of 3.6 m is held so that the top circular face is 4.2 m below the water. The mass of the block is 829.0 kg. The mass density of water is 1000kg/m^3. What is the pressure at the top face of the cylinder?

- - 3.40E4 Pa
- + 4.12E4 Pa
- - 4.99E4 Pa
- - 6.04E4 Pa
- - 7.32E4 Pa

4) A 7.0 cm diameter pipe can fill a 2.1 m^3 volume in 8.0 minutes. Before exiting the pipe, the diameter is reduced to 1.7 cm (with no loss of flow rate). What is the speed in the first (wider) pipe?

- +a) 1.14E0 m/s
- -b) 1.38E0 m/s
- -c) 1.67E0 m/s
- -d) 2.02E0 m/s
- -e) 2.45E0 m/s

5) {The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.68 kg is filled with 0.17 kg of water. What fraction of the heat went into the aluminum?

- -a) 2.8 x 10
^{-1} - -b) 3.3 x 10
^{-1} - -c) 3.9 x 10
^{-1} - +d) 4.6 x 10
^{-1} - -e) 5.5 x 10
^{-1}

6) A car with a tire radius of 0.21 m accelerates from 0 to 26 m/s in 9.1 seconds. What is the angular acceleration of the wheel?

- -a) 7.65 x 10
^{0}m - -b) 9.27 x 10
^{0}m - -c) 1.12 x 10
^{1}m - +d) 1.36 x 10
^{1}m - -e) 1.65 x 10
^{1}m

7) A lead filled bicycle wheel of radius 0.38 m and mass 2.8 kg is rotating at a frequency of 1.7 revolutions per second. What is the total kinetic energy if the wheel is rotating about a stationary axis?

- -a) 1.07 x 10
^{1}J - -b) 1.3 x 10
^{1}J - -c) 1.57 x 10
^{1}J - -d) 1.9 x 10
^{1}J - +e) 2.31 x 10
^{1}J

_{1}= 1.6 kPa, P

_{2}= 4.3 kPa. The volumes are V

_{1}= 1.6m

^{3}and V

_{4}= 3.2m

^{3}. How much work is involved between 1 and 4?

- +a) 2.56 x 10
^{3}J - -b) 8.1 x 10
^{3}J - -c) 2.56 x 10
^{4}J - -d) 8.1 x 10
^{4}J - -e) 2.56 x 10
^{5}J

_{1}= 2.6 kPa, P

_{2}= 5.7 kPa. The volumes are V

_{1}= 2.7m

^{3}and V

_{4}= 5.5m

^{3}. What is the temperature at step 4?

- +a) 1.15 x 10
^{3}K - -b) 3.63 x 10
^{3}K - -c) 1.15 x 10
^{4}K - -d) 3.63 x 10
^{4}K - -e) 1.15 x 10
^{5}K

10) A cylinder with a radius of 0.29 m and a length of 2.8 m is held so that the top circular face is 4.6 m below the water. The mass of the block is 952.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the water at the top surface?

- + 1.19E4 N
- - 1.50E4 N
- - 1.89E4 N
- - 2.38E4 N
- - 2.99E4 N

### pht:T4:V2

[edit | edit source]1) A cylinder with a radius of 0.29 m and a length of 2.3 m is held so that the top circular face is 4.7 m below the water. The mass of the block is 968.0 kg. The mass density of water is 1000kg/m^3. What is the pressure at the top face of the cylinder?

- 2.59E4 Pa
- 3.14E4 Pa
- 3.80E4 Pa
- 4.61E4 Pa
- 5.58E4 Pa

_{1}= 1.5 kPa, P

_{2}= 2.7 kPa. The volumes are V

_{1}= 1.9m

^{3}and V

_{4}= 4.4m

^{3}. How much work is involved between 1 and 4?

- a) 3.75 x 10
^{2}J - b) 1.19 x 10
^{3}J - c) 3.75 x 10
^{3}J - d) 1.19 x 10
^{4}J - e) 3.75 x 10
^{4}J

3) A 6.7 cm diameter pipe can fill a 2.2 m^3 volume in 8.0 minutes. Before exiting the pipe, the diameter is reduced to 2.3 cm (with no loss of flow rate). What is the speed in the first (wider) pipe?

- a) 8.86E-1 m/s
- b) 1.07E0 m/s
- c) 1.30E0 m/s
- d) 1.57E0 m/s
- e) 1.91E0 m/s

4) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.95 kg is filled with 0.19 kg of water. What fraction of the heat went into the aluminum?

- a) 5.2 x 10
^{-1} - b) 6.1 x 10
^{-1} - c) 7.2 x 10
^{-1} - d) 8.5 x 10
^{-1} - e) 1 x 10
^{0}

5) A cylinder with a radius of 0.29 m and a length of 2.8 m is held so that the top circular face is 4.6 m below the water. The mass of the block is 952.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the water at the top surface?

- 1.19E4 N
- 1.50E4 N
- 1.89E4 N
- 2.38E4 N
- 2.99E4 N

6) A window is square, with a length of each side equal to 0.78 meters. The glass has a thickness of 11 mm. To decrease the heat loss, you reduce the size of the window by decreasing the length of each side by a factor of 1.31. You also increase the thickness of the glass by a factor of 2.97. If the inside and outside temperatures are unchanged, by what factor have you decreased the heat flow?. By what factor have you decreased the heat flow (assuming the same inside and outside temperatures).

- a) 2.37 x 10
^{0}unit - b) 2.87 x 10
^{0}unit - c) 3.47 x 10
^{0}unit - d) 4.21 x 10
^{0}unit - e) 5.1 x 10
^{0}unit

7) A car with a tire radius of 0.23 m accelerates from 0 to 23 m/s in 10.5 seconds. What is the angular acceleration of the wheel?

- a) 9.52 x 10
^{0}m - b) 1.15 x 10
^{1}m - c) 1.4 x 10
^{1}m - d) 1.69 x 10
^{1}m - e) 2.05 x 10
^{1}m

8) A lead filled bicycle wheel of radius 0.35 m and mass 2.7 kg is rotating at a frequency of 1.5 revolutions per second. What is the total kinetic energy if the wheel is rotating about a stationary axis?

- a) 8.26 x 10
^{0}J - b) 1 x 10
^{1}J - c) 1.21 x 10
^{1}J - d) 1.47 x 10
^{1}J - e) 1.78 x 10
^{1}J

9) What is the rms speed of a molecule with an atomic mass of 18 if the temperature is 12 degrees Fahrenheit?

- a) 2.8 x 10
^{2}m/s - b) 3.39 x 10
^{2}m/s - c) 4.11 x 10
^{2}m/s - d) 4.97 x 10
^{2}m/s - e) 6.03 x 10
^{2}m/s

_{1}= 1.5 kPa, P

_{2}= 3 kPa. The volumes are V

_{1}= 2.4m

^{3}and V

_{4}= 4.5m

^{3}. What is the temperature at step 4?

- a) 1.6 x 10
^{1}K - b) 5.07 x 10
^{1}K - c) 1.6 x 10
^{2}K - d) 5.07 x 10
^{2}K - e) 1.6 x 10
^{3}K

#### KEY:pht:T4:V2

[edit | edit source]pht20160713T110054

1) A cylinder with a radius of 0.38 m and a length of 2.3 m is held so that the top circular face is 4.5 m below the water. The mass of the block is 909.0 kg. The mass density of water is 1000kg/m^3. What is the pressure at the top face of the cylinder?

- - 2.48E4 Pa
- - 3.00E4 Pa
- - 3.64E4 Pa
- + 4.41E4 Pa
- - 5.34E4 Pa

_{1}= 1.5 kPa, P

_{2}= 2.7 kPa. The volumes are V

_{1}= 1.9m

^{3}and V

_{4}= 4.4m

^{3}. How much work is involved between 1 and 4?

- -a) 3.75 x 10
^{2}J - -b) 1.19 x 10
^{3}J - +c) 3.75 x 10
^{3}J - -d) 1.19 x 10
^{4}J - -e) 3.75 x 10
^{4}J

3) A 6.3 cm diameter pipe can fill a 1.4 m^3 volume in 8.0 minutes. Before exiting the pipe, the diameter is reduced to 4.8 cm (with no loss of flow rate). What is the speed in the first (wider) pipe?

- -a) 7.72E-1 m/s
- +b) 9.36E-1 m/s
- -c) 1.13E0 m/s
- -d) 1.37E0 m/s
- -e) 1.66E0 m/s

4) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.95 kg is filled with 0.19 kg of water. What fraction of the heat went into the aluminum?

- +a) 5.2 x 10
^{-1} - -b) 6.1 x 10
^{-1} - -c) 7.2 x 10
^{-1} - -d) 8.5 x 10
^{-1} - -e) 1 x 10
^{0}

5) A cylinder with a radius of 0.29 m and a length of 2.8 m is held so that the top circular face is 4.6 m below the water. The mass of the block is 952.0 kg. The mass density of water is 1000kg/m^3. What is the force exerted by the water at the top surface?

- + 1.19E4 N
- - 1.50E4 N
- - 1.89E4 N
- - 2.38E4 N
- - 2.99E4 N

6) A window is square, with a length of each side equal to 0.78 meters. The glass has a thickness of 11 mm. To decrease the heat loss, you reduce the size of the window by decreasing the length of each side by a factor of 1.31. You also increase the thickness of the glass by a factor of 2.97. If the inside and outside temperatures are unchanged, by what factor have you decreased the heat flow?. By what factor have you decreased the heat flow (assuming the same inside and outside temperatures).

- -a) 2.37 x 10
^{0}unit - -b) 2.87 x 10
^{0}unit - -c) 3.47 x 10
^{0}unit - -d) 4.21 x 10
^{0}unit - +e) 5.1 x 10
^{0}unit

7) A car with a tire radius of 0.31 m accelerates from 0 to 39 m/s in 9.3 seconds. What is the angular acceleration of the wheel?

- -a) 1.12 x 10
^{1}m - +b) 1.35 x 10
^{1}m - -c) 1.64 x 10
^{1}m - -d) 1.99 x 10
^{1}m - -e) 2.41 x 10
^{1}m

8) A lead filled bicycle wheel of radius 0.33 m and mass 2.2 kg is rotating at a frequency of 1.3 revolutions per second. What is the total kinetic if the wheel is rotating about a stationary axis?

- -a) 6.6 x 10
^{0}J - +b) 7.99 x 10
^{0}J - -c) 9.68 x 10
^{0}J - -d) 1.17 x 10
^{1}J - -e) 1.42 x 10
^{1}J

9) What is the rms speed of a molecule with an atomic mass of 14 if the temperature is 22 degrees Fahrenheit?

- +a) 6.9 x 10
^{2}m/s - -b) 8.37 x 10
^{2}m/s - -c) 1.01 x 10
^{3}m/s - -d) 1.23 x 10
^{3}m/s - -e) 1.49 x 10
^{3}m/s

_{1}= 2.9 kPa, P

_{2}= 4.7 kPa. The volumes are V

_{1}= 2.7m

^{3}and V

_{4}= 5.6m

^{3}. What is the temperature at step 4?

- -a) 1.03 x 10
^{1}K - -b) 3.25 x 10
^{1}K - -c) 1.03 x 10
^{2}K - -d) 3.25 x 10
^{2}K - +e) 1.03 x 10
^{3}K

### pht:FE:V1

[edit | edit source]1) In the figure "3 tensions" shown above θ_{1} is 18 degrees, and θ_{3} is 35 degrees. The tension T_{3} 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.

2) 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.

3) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.61 kg is filled with 0.21 kg of water. You are consulting for the flat earth society, a group of people who believe that the acceleration of gravity equals 9.8 m/s/s at all altitudes. Based on this assumption, from what height must the water and container be dropped to achieve the same change in temperature? (For comparison, Earth's radius is 6,371 kilometers)

- a) 6.33 x 10
^{0}km - b) 7.66 x 10
^{0}km - c) 9.29 x 10
^{0}km - d) 1.13 x 10
^{1}km - e) 1.36 x 10
^{1}km

4) A large cylinder is filled with water so that the bottom is 7.8 m below the waterline. At the bottom is a small hole with a diameter of 5.4E-4 m. How fast is the water flowing at the hole? (Neglect viscous effects, turbulence, and also assume that the hole is so small that no significant motion occurs at the top of the cylinder.)

- a) 8.42E0 m/s
- b) 1.02E1 m/s
- c) 1.24E1 m/s
- d) 1.50E1 m/s
- e) 1.81E1 m/s

5) A cylinder with a radius of 0.38 m and a length of 2.2 m is held so that the top circular face is 3.8 m below the water. The mass of the block is 903.0 kg. The mass density of water is 1000kg/m^3. What is the buoyant force?

- 8.07E3 N
- 9.78E3 N
- 1.18E4 N
- 1.44E4 N
- 1.74E4 N

_{1}= 2.2 kPa, P

_{2}= 3.7 kPa. The volumes are V

_{1}= 1.8m

^{3}and V

_{4}= 4.4m

^{3}. How much work is involved between 1 and 4?

- a) 1.81 x 10
^{2}J - b) 5.72 x 10
^{2}J - c) 1.81 x 10
^{3}J - d) 5.72 x 10
^{3}J - e) 1.81 x 10
^{4}J

7) What is the root-mean-square of 1, 9, and -10?

- a) 4.914 x 10
^{0} - b) 5.514 x 10
^{0} - c) 6.187 x 10
^{0} - d) 6.942 x 10
^{0} - e) 7.789 x 10
^{0}

- a) 55 m/s.
- b) 59 m/s.
- c) 63 m/s.
- d) 68 m/s.
- e) 73 m/s.

9) A lead filled bicycle wheel of radius 0.38 m and mass 2.8 kg is rotating at a frequency of 1.7 revolutions per second. What is the moment of inertia?

- a) 3.34 x 10
^{-1}kg m^{2}/s^{2} - b) 4.04 x 10
^{-1}kg m^{2}/s^{2} - c) 4.9 x 10
^{-1}kg m^{2}/s^{2} - d) 5.93 x 10
^{-1}kg m^{2}/s^{2} - e) 7.19 x 10
^{-1}kg m^{2}/s^{2}

10) Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

- a) 7.0 meters
- b) 11.0 meters
- c) 9.0 meters
- d) 10.0 meters
- e) 8.0 meters

11) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 6.1 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.79 m, and moves at a constant speed of 2.87 m/s in the +y direction. At what time do they meet?

- a) 0.43 s.
- b) 0.52 s.
- c) 0.62 s.
- d) 0.75 s.
- e) 0.9 s.

12) 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/s
^{2}. - b) 8 m/s
^{2}. - c) 9.2 m/s
^{2}. - d) 10.6 m/s
^{2}. - e) 12.1 m/s
^{2}.

- a) 1.053 kg
- b) 1.106 kg
- c) 1.161 kg
- d) 1.219 kg
- e) 1.280 kg

14) What is the acceleration if a car travelling at 10.95 m/s makes a skid mark that is 6.25 m long before coming to rest? (Assume uniform acceleration.)

- a) 6.66m/s
^{2}. - b) 7.99m/s
^{2}. - c) 9.59m/s
^{2}. - d) 11.51m/s
^{2}. - e) 13.81m/s
^{2}.

- a) 1.40E+01 N
- b) 1.70E+01 N
- c) 2.06E+01 N
- d) 2.49E+01 N
- e) 3.02E+01 N

16) 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

#### KEY:pht:FE:V1

[edit | edit source]pht20160713T110054

1) In the figure "3 tensions" shown above θ_{1} is 16 degrees, and θ_{3} is 30 degrees. The tension T_{3} 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 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.

3) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.95 kg is filled with 0.19 kg of water. You are consulting for the flat earth society, a group of people who believe that the acceleration of gravity equals 9.8 m/s/s at all altitudes. Based on this assumption, from what height must the water and container be dropped to achieve the same change in temperature? (For comparison, Earth's radius is 6,371 kilometers)

- -a) 5.24 x 10
^{0}km - +b) 6.35 x 10
^{0}km - -c) 7.7 x 10
^{0}km - -d) 9.32 x 10
^{0}km - -e) 1.13 x 10
^{1}km

4) A large cylinder is filled with water so that the bottom is 7.0 m below the waterline. At the bottom is a small hole with a diameter of 7.8E-4 m. How fast is the water flowing at the hole? (Neglect viscous effects, turbulence, and also assume that the hole is so small that no significant motion occurs at the top of the cylinder.)

- -a) 7.98E0 m/s
- -b) 9.67E0 m/s
- +c) 1.17E1 m/s
- -d) 1.42E1 m/s
- -e) 1.72E1 m/s

5) A cylinder with a radius of 0.29 m and a length of 2.3 m is held so that the top circular face is 4.7 m below the water. The mass of the block is 968.0 kg. The mass density of water is 1000kg/m^3. What is the buoyant force?

- + 5.96E3 N
- - 7.21E3 N
- - 8.74E3 N
- - 1.06E4 N
- - 1.28E4 N

_{1}= 1.1 kPa, P

_{2}= 3.5 kPa. The volumes are V

_{1}= 1.2m

^{3}and V

_{4}= 2.5m

^{3}. How much work is involved between 1 and 4?

- -a) 1.43 x 10
^{1}J - -b) 4.52 x 10
^{1}J - -c) 1.43 x 10
^{2}J - -d) 4.52 x 10
^{2}J - +e) 1.43 x 10
^{3}J

7) What is the root-mean-square of 9, -17, and -8?

- +a) 1.203 x 10
^{1} - -b) 1.35 x 10
^{1} - -c) 1.514 x 10
^{1} - -d) 1.699 x 10
^{1} - -e) 1.906 x 10
^{1}

- -a) 47 m/s.
- -b) 51 m/s.
- +c) 54 m/s.
- -d) 58 m/s.
- -e) 62 m/s.

9) A lead filled bicycle wheel of radius 0.33 m and mass 2.2 kg is rotating at a frequency of 1.3 revolutions per second. What is the moment of inertia?

- +a) 2.4 x 10
^{-1}kg m^{2}/s^{2} - -b) 2.9 x 10
^{-1}kg m^{2}/s^{2} - -c) 3.52 x 10
^{-1}kg m^{2}/s^{2} - -d) 4.26 x 10
^{-1}kg m^{2}/s^{2} - -e) 5.16 x 10
^{-1}kg m^{2}/s^{2}

10) Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

- -a) 11.0 meters
- -b) 8.0 meters
- -c) 9.0 meters
- -d) 7.0 meters
- +e) 10.0 meters

11) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 5.86 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.46 m, and moves at a constant speed of 2.23 m/s in the +y direction. At what time do they meet?

- +a) 0.45 s.
- -b) 0.54 s.
- -c) 0.65 s.
- -d) 0.78 s.
- -e) 0.94 s.

12) 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/s
^{2}. - +b) 9.4 m/s
^{2}. - -c) 10.8 m/s
^{2}. - -d) 12.4 m/s
^{2}. - -e) 14.3 m/s
^{2}.

- - a) 0.225 kg
- - b) 0.236 kg
- + c) 0.248 kg
- - d) 0.260 kg
- - e) 0.273 kg

14) What is the acceleration if a car travelling at 9.75 m/s makes a skid mark that is 8 m long before coming to rest? (Assume uniform acceleration.)

- -a) 2.87m/s
^{2}. - -b) 3.44m/s
^{2}. - -c) 4.13m/s
^{2}. - -d) 4.95m/s
^{2}. - +e) 5.94m/s
^{2}.

- +a) 3.52E+01 N
- -b) 4.27E+01 N
- -c) 5.17E+01 N
- -d) 6.26E+01 N
- -e) 7.59E+01 N

16) 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) south
- -d) northeast
- -e) north

### pht:FE:V2

[edit | edit source]1) Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

- a) 11.0 meters
- b) 10.0 meters
- c) 8.0 meters
- d) 9.0 meters
- e) 7.0 meters

2) A large cylinder is filled with water so that the bottom is 8.8 m below the waterline. At the bottom is a small hole with a diameter of 6.3E-4 m. How fast is the water flowing at the hole? (Neglect viscous effects, turbulence, and also assume that the hole is so small that no significant motion occurs at the top of the cylinder.)

- a) 1.08E1 m/s
- b) 1.31E1 m/s
- c) 1.59E1 m/s
- d) 1.93E1 m/s
- e) 2.34E1 m/s

_{1}= 3.1 kPa, P

_{2}= 4.3 kPa. The volumes are V

_{1}= 1.1m

^{3}and V

_{4}= 2.8m

^{3}. How much work is involved between 1 and 4?

- a) 1.67 x 10
^{3}J - b) 5.27 x 10
^{3}J - c) 1.67 x 10
^{4}J - d) 5.27 x 10
^{4}J - e) 1.67 x 10
^{5}J

4) What is the acceleration if a car travelling at 8.35 m/s makes a skid mark that is 8.5 m long before coming to rest? (Assume uniform acceleration.)

- a) 2.37m/s/2.
- b) 2.85m/s/2.
- c) 3.42m/s/2.
- d) 4.1m/s/2.
- e) 4.92m/s/2.

5) In the figure "3 tensions" shown above θ_{1} is 16 degrees, and θ_{3} is 30 degrees. The tension T_{3} 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.

- a) 0.608 kg
- b) 0.638 kg
- c) 0.670 kg
- d) 0.703 kg
- e) 0.739 kg

7) What is the root-mean-square of 36, 6, and -23?

- a) 1.763 x 10
^{1} - b) 1.978 x 10
^{1} - c) 2.22 x 10
^{1} - d) 2.491 x 10
^{1} - e) 2.795 x 10
^{1}

8) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 7.03 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.12 m, and moves at a constant speed of 2 m/s in the +y direction. At what time do they meet?

- a) 0.15 s.
- b) 0.18 s.
- c) 0.22 s.
- d) 0.26 s.
- e) 0.31 s.

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

10) 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/s
^{2}. - b) 5.3 m/s
^{2}. - c) 6.1 m/s
^{2}. - d) 7 m/s
^{2}. - e) 8.1 m/s
^{2}.

11) 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.

12) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.99 kg is filled with 0.26 kg of water. You are consulting for the flat earth society, a group of people who believe that the acceleration of gravity equals 9.8 m/s/s at all altitudes. Based on this assumption, from what height must the water and container be dropped to achieve the same change in temperature? (For comparison, Earth's radius is 6,371 kilometers)

- a) 3.16 x 10
^{0}km - b) 3.83 x 10
^{0}km - c) 4.64 x 10
^{0}km - d) 5.62 x 10
^{0}km - e) 6.81 x 10
^{0}km

- a) 3.52E+01 N
- b) 4.27E+01 N
- c) 5.17E+01 N
- d) 6.26E+01 N
- e) 7.59E+01 N

14) A lead filled bicycle wheel of radius 0.38 m and mass 2.8 kg is rotating at a frequency of 1.7 revolutions per second. What is the moment of inertia?

- a) 3.34 x 10
^{-1}kg m^{2}/s^{2} - b) 4.04 x 10
^{-1}kg m^{2}/s^{2} - c) 4.9 x 10
^{-1}kg m^{2}/s^{2} - d) 5.93 x 10
^{-1}kg m^{2}/s^{2} - e) 7.19 x 10
^{-1}kg m^{2}/s^{2}

15) A cylinder with a radius of 0.25 m and a length of 3.5 m is held so that the top circular face is 3.3 m below the water. The mass of the block is 922.0 kg. The mass density of water is 1000kg/m^3. What is the buoyant force?

- 5.56E3 N
- 6.73E3 N
- 8.16E3 N
- 9.89E3 N
- 1.20E4 N

- a) 55 m/s.
- b) 58 m/s.
- c) 62 m/s.
- d) 67 m/s.
- e) 71 m/s.

#### KEY:pht:FE:V2

[edit | edit source]pht20160713T110054

1) Mr. Smith starts from rest and accelerates to 4 m/s in 5 seconds. How far did he travel?

- -a) 11.0 meters
- -b) 8.0 meters
- -c) 9.0 meters
- -d) 7.0 meters
- +e) 10.0 meters

2) A large cylinder is filled with water so that the bottom is 7.0 m below the waterline. At the bottom is a small hole with a diameter of 7.8E-4 m. How fast is the water flowing at the hole? (Neglect viscous effects, turbulence, and also assume that the hole is so small that no significant motion occurs at the top of the cylinder.)

- -a) 7.98E0 m/s
- -b) 9.67E0 m/s
- +c) 1.17E1 m/s
- -d) 1.42E1 m/s
- -e) 1.72E1 m/s

_{1}= 1.6 kPa, P

_{2}= 4.3 kPa. The volumes are V

_{1}= 1.6m

^{3}and V

_{4}= 3.2m

^{3}. How much work is involved between 1 and 4?

- +a) 2.56 x 10
^{3}J - -b) 8.1 x 10
^{3}J - -c) 2.56 x 10
^{4}J - -d) 8.1 x 10
^{4}J - -e) 2.56 x 10
^{5}J

4) What is the acceleration if a car travelling at 10.95 m/s makes a skid mark that is 6.25 m long before coming to rest? (Assume uniform acceleration.)

- -a) 6.66m/s
^{2}. - -b) 7.99m/s
^{2}. - +c) 9.59m/s
^{2}. - -d) 11.51m/s
^{2}. - -e) 13.81m/s
^{2}.

5) In the figure "3 tensions" shown above θ_{1} is 16 degrees, and θ_{3} is 30 degrees. The tension T_{3} 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.

- - a) 0.494 kg
- - b) 0.519 kg
- + c) 0.544 kg
- - d) 0.572 kg
- - e) 0.600 kg

7) What is the root-mean-square of 45, 23, and -43?

- -a) 3.414 x 10
^{1} - +b) 3.831 x 10
^{1} - -c) 4.298 x 10
^{1} - -d) 4.823 x 10
^{1} - -e) 5.411 x 10
^{1}

8) At time, t=0, two particles are on the x axis. Particle A is (initially) at the origin and moves at a constant speed of 7.34 m/s at an angle of θ above the x-axis. Particle B is initially situated at x= 2.22 m, and moves at a constant speed of 2.91 m/s in the +y direction. At what time do they meet?

- -a) 0.23 s.
- -b) 0.27 s.
- +c) 0.33 s.
- -d) 0.4 s.
- -e) 0.47 s.

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) south
- -b) northwest
- +c) southeast
- -d) northeast
- -e) north

10) 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/s
^{2}. - +b) 8.4 m/s
^{2}. - -c) 9.7 m/s
^{2}. - -d) 11.1 m/s
^{2}. - -e) 12.8 m/s
^{2}.

11) 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.

12) The specific heat of water and aluminum are 4186 and 900, respectively, where the units are J/kg/Celsius. An aluminum container of mass 0.61 kg is filled with 0.21 kg of water. You are consulting for the flat earth society, a group of people who believe that the acceleration of gravity equals 9.8 m/s/s at all altitudes. Based on this assumption, from what height must the water and container be dropped to achieve the same change in temperature? (For comparison, Earth's radius is 6,371 kilometers)

- -a) 6.33 x 10
^{0}km - -b) 7.66 x 10
^{0}km - -c) 9.29 x 10
^{0}km - -d) 1.13 x 10
^{1}km - +e) 1.36 x 10
^{1}km

- -a) 1.54E+01 N
- -b) 1.86E+01 N
- +c) 2.25E+01 N
- -d) 2.73E+01 N
- -e) 3.31E+01 N

14) A lead filled bicycle wheel of radius 0.35 m and mass 2.7 kg is rotating at a frequency of 1.5 revolutions per second. What is the moment of inertia?

- -a) 2.25 x 10
^{-1}kg m^{2}/s^{2} - -b) 2.73 x 10
^{-1}kg m^{2}/s^{2} - +c) 3.31 x 10
^{-1}kg m^{2}/s^{2} - -d) 4.01 x 10
^{-1}kg m^{2}/s^{2} - -e) 4.85 x 10
^{-1}kg m^{2}/s^{2}

15) A cylinder with a radius of 0.24 m and a length of 3.8 m is held so that the top circular face is 3.5 m below the water. The mass of the block is 853.0 kg. The mass density of water is 1000kg/m^3. What is the buoyant force?

- - 5.56E3 N
- + 6.74E3 N
- - 8.16E3 N
- - 9.89E3 N
- - 1.20E4 N

- -a) 41 m/s.
- -b) 44 m/s.
- -c) 47 m/s.
- -d) 50 m/s.
- +e) 54 m/s.