Exam 8: Rotational Motion

A boy plays solitary seesaw by placing a long plank over a small rock and sitting at one end of the plank.When the seesaw is balanced,the boy's mass is most likely

Neglecting air resistance,which will roll from rest to the bottom of an incline first,an empty jar,or the same jar filled with peanut butter?

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

When a twirling ice skater brings her arms inward,her rotational speed

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

A torque acting on an object tends to produce

A ball rolls down a hill mainly because of

If the polar icecaps melted,the resulting water would spread over the entire Earth.This new mass distribution would tend to make the length of a day

To kick a football so it won't topple end over end,kick it so the force of impact extends

A 1-kg rock is suspended from the tip of a meter stick at the 0-cm mark so that the meter stick balances like a seesaw when the fulcrum is at the 25-cm mark.From this information,what is the mass of the meter stick?

Consider a rotating donut-shaped space habitat where living quarters are on the inside surface farthest from the axis.If the rotational speed of the habitat increases,the apparent weight of people inside

A small boy places a rock under the middle of a of a long wood plank,sits near one end and his mother sits near the opposite end.To balance each other

You know that you can safely stand on the overhanging end of a heavy plank that rests on a table.How far out depends on your mass and the mass of the plank.Suppose you can stand on the end of a plank that overhangs the edge of the supporting table 1/4 its total length.Then how massive is the plank compared to your mass?

Strictly speaking,to weigh less in the Northern Hemisphere,you should move to a location further

Put a pipe over the end of a wrench when trying to turn a stubborn nut on a bolt,to effectively make the wrench handle twice as long,you'll multiply the torque by

Since each rolling wheel of a railroad train is tapered,the narrow part of the wheel has a tangential speed that is

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

The rotational inertia of your leg is greater when your leg is

Stand a meterstick on its end and let go and it rotates to the floor.If you attach a heavy weight to its upper end and repeat,falling time will be

The long,heavy tail of a spider monkey enables the monkey to easily vary its