1. What are potential and kinetic energy?

2. Energy…
…is the ability to make things move

3. The seven types of energy…
Chemical - gasoline,
Light – flash light,
Heat – burner on a stove,
Nuclear - sun,
Mechanical - car,
Sound – music on the radio,
Electrical - lightning

4. Definitions Kinetic Energy: the energy of motion
Potential Energy: stored energy

5. How is all energy divided?
Potential
Energy
Kinetic
Energy
Gravitation
Potential
Energy
Elastic
Chemical

6. What is Potential Energy?
Energy that is stored and waiting to be used later

7. What is Gravitational Potential Energy?
Potential energy due to an object’s position
P.E. = mass x
height x gravity
Don’t look down, Rover!
Good boy!

8. What is Elastic Potential Energy?
Potential energy due compression or expansion of an elastic object.
Notice the ball compressing
and expanding

9. What is Chemical Potential Energy?
Potential energy stored within the chemical bonds of an object

10. What is Kinetic Energy? Energy an object has due to its motion
K.E. = .5(mass x speed2)

11. A Roller Coaster
A roller coaster speeds along its track. It has kinetic energy because it is moving.

13. A Roller Coaster
As it slows to a stop at the top of a hill, it has potential energy because of where it is. It has the potential to move because it is above the ground and has somewhere to go.

15. What type of energy is this? (Remember the seven types?)

17. Right, mechanical. What if the cars crashed and burned
Right, mechanical. What if the cars crashed and burned? What type would it be?

19. Right, heat.

21. Substances like wood, coal, oil, and gasoline have stored energy because of their chemistry – they can burn
Stored energy is potential energy

22. Potential Energy can be changed into Kinetic Energy
Also Kinetic Energy can be changed into Potential Energy