Angular momentum
measure of the extent to which an object will continue to rotate in the absence of an applied torque / From Wikipedia, the free encyclopedia
The angular momentum or rotational momentum (L) of an object rotating about an axis is the product of its moment of inertia and its angular velocity:
![Thumb image](http://upload.wikimedia.org/wikipedia/commons/thumb/6/68/Cup_of_Russia_2010_-_Yuko_Kawaguti_%282%29.jpg/220px-Cup_of_Russia_2010_-_Yuko_Kawaguti_%282%29.jpg)
where
is the moment of inertia (resistance to angular acceleration or deceleration, equal to the product of the mass and the square of its radius measured perpendicularly from the axis of rotation);
is the angular velocity.
There are three kinds of angular momentum: the vibrational angular momentum, the spin angular momentum and the orbital angular momentum.