Momentum Answers

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What is the momentum of a 15 kg tire rolling down a hill at 3 m/s?

A
5 kg • m/s
B
18 kg • m/s
C
45 kg • m/s
D
60 kg • m/s
2
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Two objects with different masses and different velocities have the same momentum. What must be true of the velocity of the more massive object?

A
The more massive object has a faster velocity than the less massive object.
B
The more massive object has a slower velocity than the less massive object.
C
The more massive object has the same velocity as the less massive object.
6

kg • m/s

A
2,400
B
1,600
C
–800
D
–1,600
7

kg • m/s

A
2,400
B
1,600
C
–800
D
–1,600
8

If the action force is the boy pushing on the ball, what is the reaction force?

Answers:
Selection 1:the ball pushing on the boy
Selection 2:right
9

✔ rightX leftupdown

A
✔ right
B
X left
C
up
D
down
10

Your class is performing an experiment which involves dropping an object from a great height. Your job is to minimize the damage to the object. Use your knowledge of momentum, force, and collision time to complete the sentence, using the drop-down menus.

Answers:
While the change in will remain the same during a collision, the force needed to bring an object to a stop can be if the time of the collision is .:momentum
While the change in will remain the same during a collision, the force needed to bring an object to a stop can be if the time of the collision is .:decreased
While the change in will remain the same during a collision, the force needed to bring an object to a stop can be if the time of the collision is .:increased

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