1. 15.1 Energy Conversion and Conservation
Chapter 15
15.1 Energy Conversion and Conservation

2. Law of Conservation of Energy
Energy can be converted from one form to another but not created or destroyed.

3. Energy Conversion
Energy conversion is the process of changing energy from one form to another.

4. Lighting a Match Chemical energy in your body moves your hand.
This produces kinetic energy.
Friction of the moving match causes it to strike.
This is thermal energy.

5. Energy Conversions
The gravitational potential energy (GPE) of an object is converted to the kinetic energy (KE) of motion as the object falls.

6. Energy Conversion Calculations
Mechanical energy = kinetic energy + potential energy
Mechanical energy = KE + PE

7. Conservation of Mechanical Energy
(KE + PE) beginning = (KE + PE) end

8. Energy and Mass
Einstein’s equation (E = mc2) says that energy and mass are equivalent and can be converted into each other.

9. Energy and Mass
That means that :
Energy is released as matter is destroyed, and matter can be created from energy.