Angular Momentum and Torque

An industrial flywheel has a greater rotational inertia when most of its mass is

• nearer the axis

• uniformly spread out as in a disk

• nearer the rim

A flywheel's diameter is twice that of another of the same shape and mass. Roational inertia of the larger flywheel is

• two times greater

• four times greater

• the same as the other

• half that of the other

A ring, a disk, and a solid sphere begin rolling down a hill together. Which reaches the bottom first?

• disk

• ring

• sphere

• all reach the bottom at the same time

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A torque acting on an object tends to produce

• a center of gravity

• rotation

• linear motion

• equilibrium

• velocity

To rotate a stubborn screw, it is best to use a screwdriver that has a

• wide handle

• long handle

• smooth handle

• none of these

Why are you more stable when riding a bicycle at a faster speed?

• You have more mass
• The wheels have angular momentum
• It's not easier to ride at a faster speed
• The bike has more momentum

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What happens to her angular velocity when a figure skater brings in her arms?

• Increases her angular velocity
• Decreases her angular velocity
• Has no affect

In order to do a lot of flips an Olympic diver would want:

• A high rotational inertia
• A low rotational inertia
• A low linear acceleration
• A low angular velocity

Which has greater linear speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail?

• the inside horse
• the outside horse
• Neither

How do you get the maximum torque?

• longer lever arm and more force at an acute angle
• shorter lever arm with more force perpendicularly
• shorter lever arm and more force perpendicularly
• longer lever arm with more force perpendicularly