Physics equations/03-Two-Dimensional Kinematics/Q:SmithTrain

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A

1

The Smith family is having fun on a high speed train travelling at 49.8 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 22.4 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) 14.3 m/s.
	b) 21.4 m/s.
	c) 32.1 m/s.
	d) 48.1 m/s.
	e) 72.2 m/s.

2

The Smith family is having fun on a high speed train travelling at 49.8 m/s. Mrs. Smith, who is at the front of the train, fires straight towards the back with a bullet that is going forward with respect to Earth at a speed of 26.4 m/s. What was the muzzle speed of her bullet?

	a) 15.6 m/s.
	b) 23.4 m/s.
	c) 35.1 m/s.
	d) 52.7 m/s.
	e) 79 m/s.

3

The Smith family is having fun on a high speed train travelling at 49.8 m/s. The daugher fires at Mr. Smith with a pellet gun whose muzzle speed is 29.2 m/s. She was situated across the isle, perpendicular to the length of the train. What is the speed of her bullet with respect to Earth?

	a) 17.1 m/s.
	b) 25.7 m/s.
	c) 38.5 m/s.
	d) 57.7 m/s.
	e) 86.6 m/s.

4

The Smith family got in trouble for having fun on a high speed train travelling at 49.8 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 91.8 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

	a) 64.3 m/s.
	b) 77.1 m/s.
	c) 92.5 m/s.
	d) 111.1 m/s.
	e) 133.3 m/s.

B

1

The Smith family is having fun on a high speed train travelling at 48.8 m/s. Mr. Smith is at the back of the train and fires a pellet gun with a muzzle speed of 25.7 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) 22.1 m/s.
	b) 33.1 m/s.
	c) 49.7 m/s.
	d) 74.5 m/s.
	e) 111.8 m/s.

2

The Smith family is having fun on a high speed train travelling at 48.8 m/s. Mrs. Smith, who is at the front of the train, fires straight towards the back with a bullet that is going forward with respect to Earth at a speed of 20.2 m/s. What was the muzzle speed of her bullet?

	a) 8.5 m/s.
	b) 12.7 m/s.
	c) 19.1 m/s.
	d) 28.6 m/s.
	e) 42.9 m/s.

3

The Smith family is having fun on a high speed train travelling at 48.8 m/s. The daugher fires at Mr. Smith with a pellet gun whose muzzle speed is 21.6 m/s. She was situated across the isle, perpendicular to the length of the train. What is the speed of her bullet with respect to Earth?

	a) 15.8 m/s.
	b) 23.7 m/s.
	c) 35.6 m/s.
	d) 53.4 m/s.
	e) 80 m/s.

4

The Smith family got in trouble for having fun on a high speed train travelling at 48.8 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 92.5 m/s with respect to Earth. How fast was the bullet going relative to the daughter (i.e. train)?

	a) 45.5 m/s.
	b) 54.6 m/s.
	c) 65.5 m/s.
	d) 78.6 m/s.
	e) 94.3 m/s.