Unlearn it immediately before it is too late. The world has enough smart people. If you do need to know how to find the center of mass and how to apply it, you could click here . We might as well talk about angular momentum a little. The thing that corresponds to mass is called moment of inertia or rotational inertia or just inertia, I. Don't worry about how to calculate it yet.
Omega is the rotation rate of an object in radians per second.
I times omega. The thing that corresponds to force is torque. Now in the underlined statement at the top of the page, replace the words force and momentum with torque and angular momentum, and you now have a statement of the conservation of angular momentum principle. Do not click on back , or you will have a virtual collision with virtual reality.