1. J. Gabrielse Conservation of Energy (E)

2. J. Gabrielse Conservation of Energy (E) Energy (E) means Total Energy

3. J. Gabrielse Drop a Ball off a Cliff

4. J. Gabrielse Drop a Ball off a Cliff When is the ball moving the fastest? at the lowest point * * just before it hits the grounds and just after

5. J. Gabrielse Drop a Ball off a Cliff When is the ball moving the fastest? at the lowest point * When is the ball moving the slowest? at the highest point (it has to stop in order to change directions)

6. J. Gabrielse Drop a Ball off a Cliff When is the ball moving the fastest? When is the ball moving the slowest? What is the ball trading for speed? at the highest point at the lowest point * height

7. J. Gabrielse UsUs Conservation of Energy UgUg KE J. Gabrielse

8. UgUg KE Conservation of Energy Gravitational Potential Energy Depends on Height J. Gabrielse

9. UgUg KE Kinetic Energy Depends on Speed Conservation of Energy J. Gabrielse

10. UgUg KE Mechanical Potential Energy Depends on Deformation Conservation of Energy J. Gabrielse UsUs

11. UgUg KE E = U s + U g + K J. Gabrielse UsUs

12. UgUg KE Total Energy Doesn’t Change += J. Gabrielse UsUs +

13. Energy Notes (Continued):

14. J. Gabrielse Conservation of Energy with a Pendulum When is the pendulum moving the fastest?

15. J. Gabrielse Conservation of Energy with a Pendulum When is the pendulum moving the fastest? at the lowest point

16. J. Gabrielse Conservation of Energy with a Pendulum When does the pendulum have the most kinetic energy? at the lowest point

17. J. Gabrielse Conservation of Energy with a Pendulum When does the pendulum have the most gravitational potential energy? at the highest point

18. J. Gabrielse E Conservation of Energy with a Pendulum KUgUg

19. J. Gabrielse E Conservation of Energy with a Pendulum KUgUg Gravitational Potential Energy Depends on Height

20. J. Gabrielse EUgUg Kinetic Energy Depends on Speed Conservation of Energy with a Pendulum K

21. J. Gabrielse EKUgUg E = U g + K

22. J. Gabrielse EKUgUg Total Energy Doesn’t Change +=

23. J. Gabrielse A E D C B Pendulum Review Where is the gravitational potential energy maximum? Where is the kinetic energy maximum? Where is the gravitational potential energy minimum? Where is the kinetic energy minimum?

24. J. Gabrielse Your Turn Conservation of Energy