Force: Friction, Gravity, and Magnetism

Front

What pulls objects towards the center of the Earth?

Back

Gravity

Front

What is an example of gravity in action?

Back

An apple falling from a tree.

Front

What is gravity?

Back

A force that pulls objects towards each other.

Front

What happens to opposite poles of a magnet?

Back

They attract each other.

Front

What happens to like poles of a magnet?

Back

They repel each other.

Front

What is friction?

Back

A force that opposes motion between two surfaces.

Front

Is friction always useful?

Back

No, it can slow things down or stop them.

Front

What is the effect of friction on smooth surfaces?

Back

Friction is less on smooth surfaces.

Front

What is the effect of friction on rough surfaces?

Back

Friction is greater on rough surfaces.

Front

What is magnetism?

Back

A force that can attract or repel certain materials.