Front

What are the two forces that make a paper plane fly?

Back

Push and air resistance.

Front

What two forces are at work when an object is falling?

Back

Gravity and air resistance.

Front

What force slows a drag car down?

Back

Air resistance.

Front

What is an example of balanced forces?

Back

A car moving at a constant speed.

Front

What two forces enable an athlete to benefit from elastic activities?

Back

Pull and elastic.

Front

What is force?

Back

A push or pull on an object.

Front

What is motion?

Back

The change in position of an object over time.

Front

What is gravity?

Back

A force that pulls objects toward the Earth.

Front

What is air resistance?

Back

A force that opposes the motion of an object through air.

Front

What is friction?

Back

A force that opposes the motion of two surfaces in contact.