1. Kinetic and Potential Energy have many forms

2. Types of Kinetic Motion Thermal Electrical Light Sound

3. Energy associated with movement of any object
1. Motion Energy -
Energy associated with movement of any object

4. 2. Thermal Energy (Heat) -
Total energy of the particles in an object

5. Example: Heating causes the particles to move faster = more thermal energy

6. Energy of moving electrons
4. Electrical energy -
Energy of moving electrons

7. Example : electric outlet

8. 5. Radiant or Electromagnetic (Light) energy
Travels in waves

9. Examples: lightbulb, microwave

10. Caused by an object’s vibrations
6. Sound energy-
Caused by an object’s vibrations

11. Example : guitar, boombox

12. 4 types of potential energy
1. Elastic P.E.
Gravitation P.E.
Chemical P. E.
Nuclear.

13. Energy of position due to height
Gravitational P.E. -
Energy of position due to height
GPE = mass x gravity x height
Gravity = 9.8 m/s 2

14. Example of Gravitational PE

15. Stored energy in something compressed or stretched.
Elastic P.E -
Stored energy in something compressed or stretched.

16. Example of Elastic PE

17. Chemical Potential Energy
Energy stored in chemical bonds
Examples: food, gasoline

18. Energy stored in chemical bonds
3. Chemical energy -
Energy stored in chemical bonds

19. Examples: wood, food, gasoline, batteries

20. Calculating Potential Energy
PE = (mass)(gravitational field strength)(height) or
PE = m g h
g = 9.8 N/kg
Units: N/m or Joule (J)

21. Potential energy stored in the nucleus of an atom
7. Nuclear energy -
Potential energy stored in the nucleus of an atom

22. Example : nuclear power plants, sun

23. Mechanical Energy
Sum of the
Kinetic and Potential energy

24. Examples: most moving objects have mechanical energy

25. A change from one form of energy to another
Energy Conversions -
A change from one form of energy to another

27. Lamp : electrical energy converts to light energy
Conversion example 1
Lamp : electrical energy converts to light energy

28. Water heater : Chemical energy of gas to thermal (heat ) energy
Conversion example 2:
Water heater : Chemical energy of gas to thermal (heat ) energy

29. Human body : converts chemical energy in food to mechanical energy
Conversion example 3:
Human body : converts chemical energy in food to mechanical energy

30. Energy is Conserved

31. Energy is conserved

32. Energy is Conserved

34. Pendulum

35. Law of Conservation of Energy
Energy cannot be created or destroyed
Energy can change from one form to another, but the total amount of energy always remains the same

36. Conversion of Energy
Energy is neither created nor destroyed, but transformed from one form to another.
A waterfall has both kinetic and potential energy.
The water at the top of the waterfall has stored potential energy.
Once the water leaves the top of the waterfall, the potential energy is changed into kinetic energy.