1. 11-1 Physics I Class 11 Conservative Forces, Non-Conservative Forces, and Collisions

2. 11-2 Conservation of Energy (Review)

3. 11-3 Conservative Forces Non-Conservative Forces

4. 11-4 Is Mechanical Energy Always Conserved?

5. 11-5 Example of Energy Lost to Friction (Non-Conservative Force)

6. 11-6 Example of Energy Lost to Friction (Non-Conservative Force)

7. 11-7 Elastic and Inelastic Collisions

8. 11-8 Elastic Collisions in One Dimension

9. 11-9 Elastic Collisions in One Dimension

10. 11-10 Elastic Collisions in One Dimension - Example

11. 11-11 Class #11 Take-Away Concepts

12. 11-12 Class #11 Problems of the Day

13. 11-13 Class #11 Problems of the Day

14. 11-14 Activity #11 Friction and Energy

15. 11-15 Class #11 Optional Material Elastic Collisions in 2/3D

16. 11-16 Center of Momentum Reference Frame

17. 11-17 Analyzing the Collision in the Center of Momentum

18. 11-18 Transform Back to the Laboratory Frame of Reference