Forces Review

Front

What is a normal force?

Back

A contact force that acts perpendicular to the surface of an object.

Front

What type of force is friction?

Back

A contact force that opposes the motion of an object.

Front

What is the definition of force?

Back

A push or a pull on an object.

Front

What unit is used to measure force?

Back

Newton (N)

Front

What does friction do?

Back

It always acts in the direction opposite of motion.

Front

What is gravity?

Back

A non-contact force that pulls objects toward each other.

Front

What is the difference between contact and non-contact forces?

Back

Contact forces require physical contact between objects, while non-contact forces act at a distance.

Front

What happens to friction on an icy road compared to a dry road?

Back

There is less friction on an icy road.

Front

What is an example of a non-contact force?

Back

Gravity or magnetism.

Front

What is the effect of increasing the mass of an object on the gravitational force?

Back

The gravitational force increases.