Kinetic energy

This is the energy that an object has when it is moving.

You can calculate knietic energy like this:

kinetic energy = 1/2 x mass x speed x speed

For example:

A 500kg car is travelling at 10 m/s.

kinetic energy = 1/2 x 500 x 10 x 10 = 25000 Joules

momentum

Momentum means how difficult it is to stop an object that is moving.

The bigger the momentum the harder it is to stop.

Momentum = mass x speed

Momentum is measured in kgm/s

Momentum can be passed on from one object to another in a collision.

Remember the clicking balls!