# Kinetic Energy

Kinetic energy is related to the velocity or motion of a system of particles.

The kinetic energy of a fixed system of particles (i.e. closed system) is defined by the equation

where m is the mass and V is the velocity of the system. The KE is a state variable in that it doesn’t matter how the system achieved the velocity.

## Learning Objectives:

Define kinetic energy. Compute kinetic energy given the mass and velocity magnitude.