Physics - Circular Motion - May 2018

Though not a true force, the apparent outward force on a rotating body is ______.

• gravity

• normal force

• centrifugal force

• tension

Does a tossed football rotate or revolve?

• rotate

• revolve

Which of the following best describes Earth's motion around the Sun?

• spin

• revolution

• rotation

• linear

Torque is defined as ______.

• mass times velocity

• force times lever arm

• momentum times radius

• force times momentum

Your tangential speed while standing at the axis of rotation of a spinning platform is zero.

• true

• false

When a can tied to a string is swung in a circle, an outwardly directed force acts on the can.

• true

• false

Any object moving in a circle is constantly accelerating.

• true

• false

If centripetal force ceased to act on an object moving in a circular path, the object would _____.

• move toward the center of the circle

• move in a straight line

• move to the north

• move toward the ground

The terms center of mass and center of gravity are interchangeable for most objects on an near _____.

• Earth

• the moon

• Mt. Everest

• the Sun

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

• the inside horse

• the outside horse

• neither - they have the same linear speed