# Kinetic Energy

## You are here

*Please note: you may not see animations, interactions or images that are potentially on this page because you have not allowed Flash to run on S-cool. To do this, click here.*

## Kinetic Energy

Kinetic energy tells us how much movement energy something has.

Kinetic energy doesn't just depend on how fast something is moving it also depends on mass.

If a car and a lorry are both travelling at the same speed the lorry will do much more damage if it hits something, than if the car does. The lorry has more kinetic energy even though they are both travelling at the same speed.

#### Calculating kinetic energy - higher level only

The amount of kinetic energy something has can be found using:

kinetic energy = ½ x mass x velocity2

Kinetic energy is measured in joules, J.

Mass is measured in kilograms, kg.

Velocity is measured in metres per second, m/s.

Here's one to try!

A pig of mass 80 kg flies over the S-Cool offices at 5 m/s. Choose the correct value for its kinetic energy from the options below: