Any good Statics tutorials?

jean28

I'm having a bit of trouble in my Statics class and I was just wondering if anyone here knew a good page with tutorials or maybe some youtube videos.

My next test covers the following topics:

- Moments (practically everything about them)
- Equilibrium of Rigid Bodies (both equilibrium of forces and moments alike)
- Friction (this one will not be as detailed as the previous two topics)
- Center of Gravity and Centroid

Thanks.