1. Chapter 7 Outline Potential Energy and Energy Conservation Gravitational potential energy Conservation of mechanical energy Elastic potential energy Springs Conservative and non-conservative forces Conservation of energy Force and potential energy Energy diagrams

2. Potential Energy

3. Gravitational Potential Energy

4. Conservation of Mechanical Energy

5. Potential Energy Example

6. Elastic Potential Energy

7. Work Done by Other Forces

8. Potential Energy Example

9. Conservative vs. Non-conservative Forces

10. Properties of Conservative Forces The work done by any conservative force has these four properties. 1.Can be expressed as difference of potential energy. 2.Is reversible. 3.Is path-independent. 4.Closed loop work is zero.

11. Conservative or Non-conservative Example?

12. Law of Conservation of Energy

13. Force and Potential Energy (1D)

14. Force and Potential Energy (3D)

16. Energy Diagram We can glean a lot of information by looking at graph of the potential energy.

17. Energy Diagram Example

18. Chapter 7 Summary Potential Energy and Energy Conservation