1. Potential VS. Kinetic Energy

2. Energy – The ability to do work
How is energy involved in the following picture?
The tennis player does work
On her racket
The racket does work on the
ball
The ball does work on the
net
Energy Video

3. What is energy? “the ability to do work”
Examples: light energy, heat energy, mechanical energy, gravitational energy, electrical energy, sound energy, chemical energy, nuclear (atomic) energy.
These forms of energy can be transferred and transformed between one another. This is of immense benefit to us.

4. Matter is substance, and energy is the mover of substance.
The combination of energy and matter make up the universe:
Matter is substance, and energy is the mover of substance.

5. STATES OF ENERGY
Potential -
Stored Energy or energy that is waiting to be transferred.
-Object is not moving or doing work.
-When work is done on an object, potential energy is stored.
-Has the ability to turn into kinetic energy.

6. What is Potential Energy?
Energy that is stored and waiting to be used later
Examples: stretched rubberband, roller coaster at the top of a hill, a diver at the end of the diving board waiting to jump.

7. The energy of motion, when energy is being transferred. Kinetic -
STATES OF ENERGY
The energy of motion, when energy is being transferred.
Kinetic -
The faster the motion, the more kinetic
energy it has. The bigger the mass, the more
kinetic energy it has.

8. What is Kinetic Energy? Energy an object has due to its motion
Examples: roller coaster going down a hill, baseball flying through the air, wind blowing, etc.

9. Potential Kinetic energy of position or energy in storage.
Water behind a dam
Hammer over head
Food on the plate
energy of motion, the form capable of doing work
Flowing water
A falling hammer
Electrons regenerating ATP in a bio’l cell

11. The Roller Coaster

13. Energy Conversions
The process of changing one form of energy into another form of energy.

14. Conservation of Energy
Energy cannot be created or destroyed, it only changes form
Examples: roller coaster going down a hill, baseball flying through the air, etc.

15. The Law of Conservation of Energy
Energy cannot be created or destroyed; it may be transformed from one form into another, but the total amount of energy never changes.

16. Conservation of Energy

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

18. 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!

19. Gravitational Potential Energy
Depends on:
Mass
Height of object (more height = more potential).
Gravity pulling on object (objects on earth would have more potential energy than objects on the moon due to more gravitational pull on earth).

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

21. Elastic Potential Energy
Examples:

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

23. Chemical Potential Energy

24. Factors that Affect Potential Energy
m = mass (kg)
h = height (m)
g = accel due to gravity
(9.8 m/s2)

25. Factors that Affect Potential Energy
Mass= the more mass an object has, the more potential energy it has.

27. Factors that Affect Potential Energy
Height = the higher the object is placed, the more potential energy it has.

28. Factors that Affect Potential Energy
Gravity = the more gravity pulling on an object, the more potential energy it has.

29. Factors that Affect Kinetic Energy
Mass = the more mass an object has, the more kinetic energy it has.

30. Why would a high speed collision cause more damage than a low speed collision?

31. Factors that Affect Kinetic Energy
Speed or Velocity = the more speed an object has the more kinetic energy it has.