The Affect of Forces on Motion

5-5.1

A push or a pull

FORCE

What forces can affect motion?

MagnetismGravityFriction

What are the four ways that force can affect motion?

Slow things down,Speed things up,

Stop thingsChange their direction

A force that acts at a distance and cannot be seen. It comes from the

furthest regions of the Earth.

Magnetism

Materials that have magnetic force

MAGNETS

Poles that are the same – S to S

and N to N . . .

REPEL

Opposite poles –

S to N and N to S

will . . .

ATTRACT

What happens to magnetic forces when they get closer?

THE GET STRONGER

Where is the greatest strength of magnetic forces on a magnet?

AT THE POLES

A pull that attracts one object to another

GRAVITY

When do you notice this attraction of one object to another?

WHEN THE OBJECT IS BIGlike a pencil to the Earth

What does the attraction of the Moon cause on the Earth?

TIDES

How does the Sun’s gravity affect the Earth?

KEEPS IT REVOLVING

The force that opposes motion when surfaces are touching

FRICTION

How can you make more friction?

MORE MASSRougher Surfaces

How can you reduce the affect of friction?

LUBRICATIONor

ROLLERS

In which states of matter does friction occur?

SOLIDSLIQUIDS

andGASES