Unit 3 Vocabulary Quiz

Match the following

• Inertia

• The tendency of an object to continue to do what is it doing

• Moment of Inertia

• The tendency for a rotating object to continue rotating

• Rotational Inertia

• A measure of the rotational inertia of an object

The inward force that keeps an object moving in a circle

• Centripetal force

• Centrifugal force

• Center of mass

• Normal force

The outward force felt by an object that is moving in a circle, also called a "fictitious force"

• Centripetal force

• Centrifugal force

• Center of mass

• Normal force

The point where all of an object's mass could be placed without changing the overall forces on the object or its rotational inertia

• Centripetal force

• Inertia

• Center of mass

• rotational mass

Match the following

• lever arm

• The point around which a lever pivots; also called the pivot

• axis of rotation

• The distance from the axis of rotation to where a force is applied

• fulcrum

• The point at which an object rotates

A vector quantity that measures the effectiveness of a force in causing rotation.

• Rotational force

• Centripetal force

• Torque

• Fulcrum

Match the following

• Retrograde

• When all the torques on an object cancel each other

• Rotational equilibrium

• Follows the idea that the sun is the center of the universe

• Heliocentric theory

• Apparent "backwards" motion of a planet