Circular Motion Chapter 9

Which has the greater linear speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail? A) The outside horse B) The inside horse C) Neither- they both have the same linear speed.

A) The outside horse

What is the direction of the force that acts on clothes in the spin cycle of a washing machine? A) Outward B) Inward C) Up D) Down

B) Inward

It is possible to rotate a very large cylindrical space habitat around its central axis at just the right speed so people inside the cylinder will experience a force that feels like gravity.

True

The outside rim of a rotating turntable has a greater linear speed than parts closer to the axis.

True

When you whirl a can on the end of a string, the centripetal force on the can is actually the pull of the string on the can.

True

People in the future may will live inside a rotating space structure that is more 2 km in diameter. Inside the structure, people on the inside of the outer edge will experience 1 g while people halfway to the axis will experience A) 2 g. B) 1 g. C) 1/2 g. D) 1/4 g.

C) 1/2 g.

Which has greater angular speed, a horse near the outside rail of a merry-go-round or a horse near the inside rail? A) The outside horse B) The inside horse C) Neither- they both have the same linear speed.

C) Neither- they both have the same linear speed.

A ladybug rests on the bottom of a tin can that is being whirled in a horizontal circle at the end dog a string. What exerts the force that holds this ladybug in a circle? A)Your Hands B) The string C) The can D) Gravity

C) The can

If you whirl a tin can on the end of a string and the string suddenly breaks, the can will A) fly directly away from you. B) fly directly toward you. C) fly off, tangent to its circular path. D) spiral away from your hand.

C) fly off, tangent to its circular path.

Which of the following is NOT a unit of rotational speed? A) Revolutions per second B) Rotations per second C) Revolutions per minute D) Meters per second

D) Meters per second

A tin can whirled on the end of a string moves in a circle because A) once the can starts moving, that is its natural tendency. B) the can continually pulls on the string C) there is force on the can pulling it outward D) the string continually pulls inward on the can

D) the string continually pulls inward on the can

A bug on a turntable will make more turns per minute if it is located nearer to the center of the record.

False

Any force that causes an object to move in a circular path is called a centripetal force.

True