1. Work, Power, & Energy

2. WORK W = Fd = ∆ET The process of moving an object by applying a force.2

3. Units of Work Look at the equation:
W = F • d, the units are the units of force times displacement.
So, Newton • meter
A Newton • meter is called a Joule
1 Joule = 1 Newton • meter
1 J = 1 N • m 3

4. 4

6. 6

7. 7

8. Can you determine the work done?8

9. The Roller Coaster ProblemF D
Find the Speeds at points A-F 9 9

10. POWER ! Power is the rate of doing work.
Power is measured in units called Watts 10

11. Units of Power The units of power are: Joules / Second = Watt J/s = W11

12. Forms of Energy 12

13. Chemical Energy 13

14. Solar Energy 14

15. Electrical Energy 15

16. Wind Energy 16

17. Sound Energy 17

18. Nuclear Energy 18

19. Heat Energy 19

20. Gravitational Potential Energy
Energy that is stored in an object due to its height
𝚫PE = mg𝚫h 20

21. Kinetic Energy
Kinetic Energy is energy of motion. 21

22. ET = PE + KE + Q Total Energy
Total energy is conserved. It can be converted between PE and KE (and into other forms as well)
Q = internal energy
ET = PE + KE + Q 22

23. W = 𝚫ET Total Energy and Work
When work is done by gravity or against it, the change in PE is equal to the work done.
W = 𝚫ET 23

24. The Roller Coaster ProblemF D
Find the Speeds at points A-F 24