# Kinetic Energy Calculator

## Calculator Use

This calculator will find the missing variable in the physics equation for Kinetic Energy of a rigid body, when two of the variables are known.

Where:

- KE = kinetic energy
- m = mass of a body
- v = velocity of a body

## Kinetic Energy

Kinetic Energy is the energy an object has owing to its motion. In classical mechanics, kinetic energy (KE) is equal to half of an object's mass (1/2*m) multiplied by the velocity squared. For example, if a an object with a mass of 10 kg (m = 10 kg) is moving at a velocity of 5 meters per second (v = 5 m/s), the kinetic energy is equal to 125 Joules, or (1/2 * 10 kg) * 5 m/s^{2}.

We use Joules, kilograms, and meters per second as our defaults, although any appropriate units for mass (grams, ounces, etc.) or velocity (miles per hour, millimeters per second, etc.) could certainly be used as well - the calculation is the same regardless.

### References/ Further Reading

*Introduction to Work and Energy -*Kahn Academy*Kinetic Energy -*The Physics Classroom

**Cite this content, page or calculator as:**

Furey, Edward "Kinetic Energy Calculator"; from *http://www.calculatorsoup.com* - Online Calculator Resource.