1. Conservation of Energy

2. 1. Transforming Energy-
Lightbulb – electric energy to light energy and thermal energy
Fuel – chemical potential energy to kinetic energy
Alarm Clock – electric energy to sound
Roller Skates – potential energy to kinetic energy

3. 2. Mechanical Energy
Total amount of potential and kinetic energy in a system
ME is energy due to the position and motion of an object
ME = potential energy + kinetic energy
Total ME does not change…however the amounts of PE and KE do
Examples

4. 3. Law of Conservation of Energy
Energy can not be created or destroyed; it simply changes forms
The total amount of energy in the universe remains constant

5. 4. Energy Conversions
Friction converts mechanical energy to thermal energy (ex: riding a bike or skates)
Mass changes to energy – nuclear fusion (sun) and nuclear fission (reactors)
Body converts chemical potential energy