1. E NERGY C ALCULATIONS

2. W ARM U P Complete the Renewable Energy Pie Chart: Round to the nearest whole number  Petroleum36%  Natural Gas27.34%  Coal18.27%  Uranium8.46%  Biomass4.54%  Hydropower2.83%  Geothermal, Solar, Wind2%  Propane1%

3. M ECHANICAL E NERGY Energy possessed by an object due to its motion or position ME= Potential Energy + Kinetic Energy ME= PE + KE

4. K INETIC E NERGY Energy in Motion Calculating Kinetic Energy You must know the mass and velocity KE= mass x velocity² or KE= ½mass x velocity² 2

5. P OTENTIAL E NERGY Potential Energy Stored Energy or the energy an object has due to its position or shape

6. G RAVITATIONAL P OTENTIAL E NERGY Gravitational Energy Potential energy caused by gravity Calculating Potential Energy/Gravitational PE GPE= mass x gravitational acceleration x height GPE= mgh gravitational acceleration= 9.8 m/s² g= 9.8 m/s²

7. L ETS P RACTICE **Unit for Energy is Joule= J An 80kg man is jogging at a rate of 4m/s. What is his kinetic Energy KE= ½ x mass x velocity² KE= ½ x 80kg x (4m/s)² KE= ½ x 80 x 16 KE= 40 x 16 KE= 640 J

8. L ETS P RACTICE What is the gravitational potential energy of a 2kg object that is 30m above the surface of the earth? What are you solving for? GPE = mgh GPE= 2 x 9.8 x 30 GPE = 588J

9. L ETS P RACTICE What is the mass of a baseball that has kinetic energy of 100 J and is traveling at 5 m/s? KE= ½ (mass)(velocity²) m= 2 x KE v² m= 2 x 100 5 m = 8 kg

10. C LASS W ORK Complete Kinetic and Potential Energy WS Show your work for all problems Make sure to use the correct unit I will check this assignment.