Unit 2 Vocabulary

Front

Friction

Back

A force that opposes motion between two surfaces that are in contact

Front

Acceleration

Back

The rate at which velocity changes: speed up, slow down, or change direction

Front

Force

Back

A push or pull exerted on an object

Front

Velocity

Back

Speed in a given direction

Front

Reference Point

Back

A place or object used for comparison to determine if an object is in motion

Front

Balanced Force

Back

Equal forces acting on an object in opposite directions

Front

Relative Motion

Back

Motion as observed from or referred to some material system constituting a frame of reference

Front

Unbalanced Force

Back

Forces that produce a nonzero net force, which changes an object's motion

Front

Inertia

Back

The tendency of an object to resist a change in its motion

Front

Mass

Back

A measure of the amount of matter in an object.