1. Energy is the ability to do work.
What is Energy?
Energy is the ability to do work.
What is work?
The transfer of energy to matter by a force that causes the matter to move in the direction of the force

2. The Law of Conservation of Energy
Energy cannot be created or destroyed. It can only change forms.
Matter cannot be created or destroyed. It can only change forms.
Similar to the Law of Conservation of Matter!

3. Potential Energy and Kinetic Energy

4. How is all energy divided?
Potential
Energy
Kinetic
Energy
Gravitational
Potential
Energy
Elastic
Chemical

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

6. 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!

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

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

9. What is Kinetic Energy? Energy an object has due to its motion
K.E. = 1/2(mass x speed2)

10. Examples: