## Kinetic Energy

This is the energy an object or particle has by reason of its motion.

The formula for kinetic energy is:

From the equation it can be seen that the kinetic energy of a moving object or particle not only depends on its motion but also on its mass.

## Example

**The kinetic energy of a car of mass 1000kg travelling at 10 m/s can be calculated as:**

KE = ½ x 1000 x (10)

^{2}KE = ½ x 1000 x 100 [

remember (10)]^{2}= 10 x 10KE = ½ x 100000

KE = 50,000 Joules or 50 kilojoules (kJ)