Gravity 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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kg • m/s

A
2,400
B
1,600
C
–800
D
–1,600
4

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.
5

kg • m/s

A
2,400
B
1,600
C
–800
D
–1,600
6

If the action force is the boy pushing on the ball, what is the reaction force? | Which way will the boy on the skateboard move?

A
the ball pushing against the air
B
the ball pushing on the boy
C
the skateboard pushing on the ground
D
the boy pushing on the skateboard

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Gravity Answers — Mad 2017 Phy Sci B -33 SS