Invisible Forces

Front

What is the SI unit used to measure force?

Back

newtons

Front

When two magnets repel, they ________________

Back

push apart

Front

A force of attraction between objects that is due to their masses is called?

Back

Gravitational Pull

Front

What are the ends of a magnet called?

Back

North and South poles

Front

How do electromagnets differ from regular magnets?

Back

They can be turned off and on, their polarity can be reversed, and their strength can be changed.

Front

What is the force that pulls objects toward each other?

Back

Gravity

Front

What is the term for the area around a magnet where magnetic forces can be detected?

Back

Magnetic Field

Front

What happens to the strength of a magnetic field as you move further away from a magnet?

Back

It decreases.

Front

What is the term for the force that opposes motion between two surfaces in contact?

Back

Friction

Front

What is the effect of increasing the mass of an object on the gravitational pull it experiences?

Back

The gravitational pull increases.