Angular Momentum

Angular Momentum is the angular analogue of Linear Momentum. The formulas are very similar to torque.

Angular momentum about the pivot at is

where is the Linear Momentum

The magnitude of the angular momentum is thus given by

We can also describe angular momentum in terms of angular speed, where

Conservation of Angular Momentum

The principle of conservation of angular momentum states that in the absence of a net external torque, the angular momentum will not change.