Momentum and Impulse Quiz

Which object has more momentum?

• 10kg mass at rest

• 10 kg mass moving at 1 m/s

• 10 kg mass moving at 2 m/s

• 10 kg mass moving at 3 m/s

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Which object below will have a larger momentum?

• 10 kg mass moving at 1 m/s

• 20 kg mass moving at 1 m/s

• 30 kg mass moving at 1 m/s

• 40 kg mass moving at 1 m/s

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For the momentum equation P=mv, if momentum is held constant and mass is decreased by 4, how does this affect velocity?

• Velocity is decreased by 4

• Velocity is increased by 4

• Velocity is decreased by 2

• Velocity is increased by 2

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You are running in your house and see a LEGO on the ground. Stepping on LEGO's are the worst! You are 65kg and you have an initial speed of 2m/s. Your legs apply a force of -5.0N to come to a stop. How long did it take you to stop?

• 26 seconds

• 0.15 seconds

• 162.5 seconds

• 0 seconds

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A car is at a red light. The driver reaches a speed of 20m/s in 3 seconds. The car is 1500kg. What is the momentum of the car when it is driving?

• 60 kgm/s

• 30 kgm/s

• 30,000 kgm/s

• 60,000 kgm/s

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If the car's engine provided 200N of force for 3.9 seconds, what is the impulse of the car?

• 780 kgm/s

• 51.3 kgm/s

• 0.0195 kgm/s

• 0 kgm/s

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A 90 kg man is standing at rest on frictionless ice. His friend throws a 10 kg ball at him with a horizontal velocity of 20 m/s. After catching the ball, what is the man's velocity?

• 0 m/s

• 1.8 m/s

• 2 m/s

• 4.5 m/s

• 20 m/s

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The impulse is ______ the change in momentum

• greater than
• equal to
• less than
• always double

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An egg gets dropped from a height of 0.1 meters and cracks. A second egg gets dropped from the same height but this time it lands on a glass of water and does not break. In terms of force and time, the second egg must have experienced...

• more force, but less time

• less force, but more time

• more force, and more time

• less force, and less time

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The air bag on a car reduces the force experienced by the driver, by extending the time of impact.

• True

• False

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