In this lecture we concluded our discussion of rotational motion by looking
at the conservation of angular momentum. We then proceeded to the next chapter
on simple harmonic motion. We began with the study of spring forces. Adding a
mass to a spring and moving it from its equilibrium position will lead to
oscillations about the equilibrium point. We looked at the sinusoidal behavior
of this motion and derived the expression for the frequency of oscillation.
Knowing the frequency, we can get the period.

The main topics are:

- Angular Momentum Defined
- Conservation of Angular Momentum
- Hooke's Force Law for Ideal Springs
- Simple Harmonic Motion - amplitude, frequency, period, angular frequency
- Period of a Spring