# Force and motion

## Direction

The way or course toward which something moves or faces.

## Distance

The amount of space between things.

## Electromagnetism

The combined force of electricity and magnetism.

## Energy transfer

The movement of energy from one object to another or the change of energy from one form to another.

## Force

The strength or energy that moves an object.

## friction

A force that slows down moving things.

## Gravity

The force that pulls things toward the center of Earth or any other object that has mass.

## Inertia

The tendency of an object to resist change the direction or speed of its motion.

## Kinetic energy

The energy that a moving body has because of its motion.

## Magnetism

A force that pushes and pulls certain metals.

## Mass

The amount of matter, measured on Earth by its weight.

## Momentum

The strength or force that keeps something moving.

## Motion

The act of going from one place to another; movement.

## Potential energy

The energy a body has because of its position, electrical charge, or structure; stored energy.

## Speed

The rate of movement.

## weight

how heavy something is, determined by the pull of gravity on the object's mass.

## Work

The act of using force to move something over a certain distance.