Front

unequal forces

Back

Forces that have different strengths.

Front

contact force

Back

A force that pushes or pulls an object by touching the object.

Front

friction

Back

A contact force that pushes against objects in motion.

Front

gravity

Back

A noncontact force of attraction between two objects.

Front

interaction

Back

The effect that one object has on another object.

Front

magnetism

Back

A force that pulls together or pushes apart certain metal objects.

Front

motion

Back

A change in position.

Front

noncontact force

Back

A force that acts on an object without touching the object.

Front

poles

Back

The parts of a magnet with the strongest magnetic force.

Front

potential energy

Back

The stored energy an object has.