Rotational Motion and Momentum Review (Short)

Information on four rotating gears is shown on a table. Which gear has the greatest angular speed?

• A

• B

• C

• D

Information on four rotating motors is shown on the table. Which motor has the least radius.

• Q

• R

• S

• T

Four forces act on a light beam that is pivoted on the left as shown. Which force has the greatest torque at the pivot?

• 3 N

• 4 N

• 5 N

• 6 N

• 0.5 N-m

• 1 N-m

• 50 N-m

• 100 N-m

• 71 rad/s²

• 143 rad/s²

• 29 rad/s²

• 50 rad/s²

Which of the following balls has the greatest magnitude of momentum?

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If each of the forces below was applied for the same time interval, which box will have the greatest change in momentum, given that each box starts from rest?

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Carts with spring plungers run into fixed barriers. The carts are identical but are carrying different loads and so have different masses. The velocity of each cart just before and just after impact is given. Which cart has the least change in momentum?

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A 10-kg box, initially at rest, moves along a frictionless horizontal surface. A horizontal force to the right is applied to the box. The magnitude of the force changes as a function of time as shown. At which time interval is the impulse delivered the greatest?

• 0 to 2 s

• 2 to 4 s

• 4 to 6 s

• 6 to 8 s

Two carts traveling in opposite directions are about to collide. The carts stick together after the collision. There is no friction between the carts and the ground. Which carts will have the greatest speed after collision?

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