1. Conservation of energy
QOD: Conservation of energy means what?

2. Energy Conversion
Energy can be transferred from one form to another form

3. Mechanical Energy
The total amount of kinetic energy and potential energy in a system
Mechanical E = PE + KE

4. Diagram - Pendulum

5. The Law of Conservation
Energy may change form, but it cannot be created or destroyed under ordinary conditions
Examples?

6. Child Eating on a Swing Example

7. Energy & Mass Einstein developed his theory of relativity in 1905
E=mc2, says that energy and mass are equivalent and can be converted into each other
E = energy; m = mass; c = speed of light
energy is released as matter is destroyed, and matter can be created from energy
however, it was found that mass and energy together are always conserved (law of conservation of energy)