Momentum Quiz review

A small economy car (Low mass) and a limousine (high mass) are pushed from rest across a parking lot, equal distance with equal force. The car that receives the greater impulse is?

• limousine

• small economy car

• neither, they are the same

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An inexperienced gymnast (A) falls from the high bars onto a cement floor. An experienced gymnast (B) falls onto a thick mat. They each have the same mass and do not bounce. Which gymnast experiences a larger impact force?

• A

• B

• Same

• Neither they float

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NGSS.HS-PS2-1

Compared to a sports car moving at 30 miles per hour, the same sports car moving at 60 miles per hour has

• twice as much momentum

• four times as much momentum

• the same momentum

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An inexperienced gymnast (A) falls from the high bars to a cement floor. An experienced gymnast (B) falls onto a thick mat. They each have the same mass and do not bounce. Which gymnast experiences a larger impact time?

• A

• B

• Neither they float

• Same

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In order to catch a ball, a baseball player moves his or her hand backwards in the direction of the ball's motion. Doing this reduces the force impact on the players hand because

• time of impact is decreased

• time of impact is increased

• velocity is reduced

• momentum is reduced

• None of these answers

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Two objects stick together and move with a common velocity after colliding. What kind of collision is it?

• elastic

• inelastic

• not a collision

• perfectly elastic

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A collision is considered elastic if

• there is no lasting deformation

• the objects don't stick together

• the objects that collide don't get warmer

• after the collision the objects have the same shape as before

• all of these answers

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A moving freight car runs into an identical car at rest on the track. The cars couple together. Compared to the velocity of the first car before the collision the velocity of the combined cars is

• more info needed

• one half as large

• twice as large

• the same

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NGSS.HS-PS2-2

Which has more momentum, a large truck moving at 30 mph, or a small truck moving at 30 mph?

• both have the same

• small truck

• large truck

• need more info

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Why do boxers pull their head away from a punch?

• decrease momentum

• decrease impact time

• decrease impact force

• decrease impulse

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