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## Rotational Kinetic EnergyEdit

The rotational kinetic energy is defined as follows:

$E_r = \frac {1}{2} I {\omega}^2$

Alternate ways to write this are:

$E_r = \frac {1}{2} \frac {L^2}{I}$

$E_r = \frac {1}{2} L \omega$

## Angular MomentumEdit

The angular momentum of an object is defined as follows:

$L = I \omega$