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

4. Energy Examples
Examples are: 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.

5. 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.

6. Energy is nature’s way of keeping score.
We sense energy only when the score changes.
Either a transformation from one form of energy to another,
or a transfer of energy from one point to another.

7. 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.

8. 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.

9. 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.

10. 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.

11. 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

13. The Roller Coaster

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

16. 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!

17. 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).

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

19. Elastic Potential Energy
Examples:

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

21. Chemical Potential Energy

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

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

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

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

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

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

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

30. Diver A
Fastest
Diver B

31. What is the source of our energy?
The source of practically all our energy is the Sun.

32. What is Mechanical Energy?
Energy due to a object’s motion (kinetic) or position (potential).
The bowling ball has mechanical energy.
When the ball strikes the pins, mechanical energy is transferred to the pins!

33. Examples of Mechanical Energy

34. What is Electromagnetic Energy?
Light energy
Includes energy from gamma rays, xrays, ultraviolet rays, visible light, infrared rays, microwave and radio bands

35. What is Electrical Energy?
Energy caused by the movement of electrons
Easily transported through power lines and converted into other forms of energy

36. What is Chemical Energy?
Energy that is available for release from chemical reactions.
The chemical bonds in a matchstick store energy that is transformed into thermal energy when the match is struck.

37. Examples of Chemical Energy

38. What is Thermal Energy?
Heat energy
The heat energy of an object determines how active its atoms are.
A hot object is one whose atoms and molecules are excited and show rapid movement.
A cooler object's molecules and atoms will show less movement.

39. ELECTROMAGNETIC ENERGY
QUIZ TIME!
What type of energy cooks food in a microwave oven?
ELECTROMAGNETIC ENERGY
What type of energy is the spinning plate inside of a microwave oven?
MECHANICAL ENERGY

40. QUIZ TIME!
Electrical energy is transported to your house through power lines.
When you plug an electric fan to a power outlet, electrical energy is transform into what type of energy?
MECHANICAL ENERGY

41. QUIZ TIME!
What energy transformation occurs when an electric lamp is turned on?
ELECTRICAL ENERGY 
ELECTROMAGNETIC ENERGY

42. What types of energy are shown below?
Mechanical and Thermal Energy
(Don’t forget friction)

43. What type of energy is shown below?
Chemical Energy

44. What types of energy are shown below?
Electrical, Mechanical and
Electromagnetic Energy

45. What type of energy is shown below?
Chemical Energy (yummy)

46. What type of energy is shown below?
Thermal Energy

47. What types of energy are shown below?
Mechanical, Electromagnetic, Electrical, Chemical and Thermal Energy

48. 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.