Force and Motion Review

Front

What is air resistance?

Back

Friction in the air that slows things down.

Front

Does friction happen in solids, liquids, and gases?

Back

True.

Front

Why do we need friction?

Back

It helps make objects go slower or stop.

Front

What force causes a pencil to fall to the ground when rolled off a desk?

Back

Gravity.

Front

What kind of surface is gravel and rocks?

Back

Rough.

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 each other, like the Earth pulling us down.

Front

What is friction?

Back

The resistance that one surface or object encounters when moving over another.

Front

What happens to an object in motion if no forces act on it?

Back

It continues to move at a constant speed in a straight line.