Exam 8: Rotational Motion

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

Each rolling wheel of a railroad train is tapered. Compared with the wide part, the narrow part of the wheel has a tangential speed that is

Compared with a force, a torque involves

The chef at the infamous Fattening Tower of Pizza tosses a spinning disk of uncooked pizza dough into the air. The disk becomes wider during its flight, while its rotational speed

If Earth rotated more slowly about its axis, your weight would

A torque acting on an object tends to produce

As a huge rotating cloud of particles in space gravitate together forming an increasingly dense ball, it shrinks in size and

For a system in mechanical equilibrium, the resultant

Which jar will roll down an incline in the shortest time, an empty one or one filled with peanut butter?

Which of these has its center of mass where no mass exists?

Stand a meterstick on its end and let it rotate to the floor. If you attach a heavy glob of clay to its upper end and repeat, the time to fall will be

Stand a broom upright on the end of its pole and let it topple to the floor. Repeat, but with the bristles end on the floor. The faster fall will be the broom standing on its

Consider two flywheels of the same size and shape, but one with twice the mass. Rotational inertia of the more massive one is

A 1-kg rock is suspended from the tip of a horizontal meterstick at the 0-cm mark so that the meterstick barely balances like a seesaw when its fulcrum is at the 12.5-cm mark. From this information, the mass of the meterstick is

A 1-kg rock is suspended from the tip of a horizontal meterstick at the 0-cm mark so that the meterstick barely balances like a seesaw when its fulcrum is at the 25-cm mark. From this information, the mass of the meterstick is

If a turntable's rotational speed is doubled, then the linear speed of a pet hamster sitting on the edge of the record will

You can swing your legs to and fro more frequently when your legs are

If you balance a broom horizontally on one finger, the center of gravity of the broom will be above your finger, closer to the bristles end than the handle end. If you saw the broom in two pieces at that point and weigh the two parts on a scale, you'll find that the heavier part is the

Which tin can will roll down an incline in the shortest time, one filled with water or one filled with ice? (Hint: water 'slides' inside the can.)

When riding at constant velocity on a Segway electric vehicle, your center of mass is