# Kinetic Energy

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## Kinetic Energy

Kinetic energy is the energy in moving objects or mass.  If it moves, it has kinetic energy.

### Kinetic Energy formula

$$\large{ KE = \frac {1}{2} m v^2 }$$

$$\large{ KE = \frac {P^2}{2m} }$$

Where:

$$\large{ KE }$$ = kinetic energy

$$\large{ m }$$ = mass

$$\large{ v }$$ = velocity

$$\large{ P }$$ = power

Solve for:

$$\large{ m = \frac {2 KE}{v^2} }$$

$$\large{ v = \sqrt { \frac {2 KE}{m} } }$$

## Rotational Kinetic Energy

### Rotational Kinetic Energy formula

$$\large{ KE_r = \frac {1}{2} I \omega^2 }$$

Where:

$$\large{ KE_r }$$ = rotational kinetic energy

$$\large{ I }$$ = moment of inertia

$$\large{ \omega }$$  (Greek symbol omega) = angular velocity

Tags: Equations for Energy