Front

An object's motion won't change unless acted on by a _________

Back

force

Front

For every action there is ______ and opposite reaction.

Back

an equal

Front

_______ force is needed to move objects of larger mass.

Back

More

Front

A still object __________ have forces acting upon it.

Back

does

Front

The force that pulls objects down towards the center of the Earth.

Back

Gravity

Front

This force is caused by objects rubbing together.

Back

Friction

Front

A rocket launches because of ______.

Back

an opposite reaction

Front

Objects in motion tend to stay in motion, while objects at rest, tend to _____________. Options: stay at rest, roll, start moving, bounce

Back

stay at rest

Front

______________ forces do not affect the movement of an object.

Back

Balanced

Front

This force is caused by air and slows things down.

Back

Air Resistance