1. Conservation of Energy

2. Law of Conservation of Energy
When energy changes from one form to another, no energy is created or destroyed
“Energy cannot be created or destroyed, only changed”

3. In ideal situations, we usually say no energy is wasted
Mechanical energy always stays the same
In reality, energy is needed to overcome friction
Turns into thermal energy and sound

4. Thermal Energy
Total kinetic and potential energy of the atoms or molecules of a substance
Depends on the mass, temperature and state of a substance

5. http://phet.colorado.edu/en/simulation/energy- skate-park-basics

6. Work
Pg 153 # 10, 11, 12