# Kinetic Energy

The Work/Energy Equation indicates
that the quantity
is important - it is called kinetic energy.
## Energy of Motion:

Kinetic energy is often called the *energy of motion*.
It's true - if you are moving, you have kinetic energy. If you aren't
moving, you don't.

## Kinetic Energy Depends on Speed:

In fact, your kinetic energy is proportional to the
*square* of your velocity - if you
go** twice as fast**, your **kinetic energy
****quadruples**.
If you go three times as fast, you have nine times the kinetic
energy.

## Kinetic Energy Depends on Mass:

Your kinetic energy is proportional to your mass. If mass doubles,
kinetic energy doubles. If mass triples, kinetic energy triples,
too.

Last update November 23, 2007 by JL Stanbrough