1. Angular Momentum

2. Equation

3. Conservation of Angular Momentum
If the net outside torque on a system is zero then the angular momentum of the system is conserved.

4. Example

6. Another Example

7. Yet Another Example

8. Yet Another Example, The Sequel

9. Problem
A turntable (I = 3.6 kgm2) is rotating at 6 rad/s when a 1 kg piece of clay is dropped onto it at a distance of 1 m from the center. What is the angular speed of the turntable after the clay is dropped on it?

10. Torque and Impulse
Any change in angular momentum is caused by a torque. The impulse is the change in angular momentum and can be found by using:

11. Angular and Linear Momentum for Point Masses
Linear momentum and angular momentum for point masses (or an object rotating about a point external to the object) are related by a factor of r, just like other linear and angular quantities.

12. Torque and Work

13. Work