1. Gravitational Potential Energy is… – “stored energy” – Stored energy due to work done against gravity

2. Formula for GPE Gravitational Potential Energy = mass x height x acceleration due to gravity GPE = m x g x h Units!! GPE = m x g x h (J)(kg)(m/s 2 )(m) Joules

3. Kinetic Energy is… – energy due to motion – If an object is motionless Velocity = zerov = 0then… Kinetic Energy = zeroKE = 0

4. Formula for KE Kinetic Energy = ½ x mass x velcoity 2 KE = ½ x m x v 2 Units!! KE= ½ m x v 2 (J)(kg)(m/s) Joules

5. Conservation of Energy Energy CANNOT BE CREATED OR DESTROYED Energy only transforms from on form to the other. Many times, energy is “lost” but really it transforms due to Friction Friction causes Thermal Energy – or Heat !! Friction can also cause Sound – which is another form of Energy

6. Conservation of Energy Watch this Youtube Clip of a professor from MIT who is almost as good as Mr. Guerra… http://www.youtube.com/watch?v=mhIOylZM g6Q http://www.youtube.com/watch?v=mhIOylZM g6Q

7. Click on these Links and Watch How the Energy is Transformed!! http://secphysics.wikispaces.com/file/view/Ki netic+and+potential+energy+in+mass- spring.swf/346884600/Kinetic%20and%20pot ential%20energy%20in%20mass-spring.swf http://secphysics.wikispaces.com/file/view/Ki netic+and+potential+energy+in+mass- spring.swf/346884600/Kinetic%20and%20pot ential%20energy%20in%20mass-spring.swf Move the blue bock on the bottom to get it started. http://www.science-animations.com/support- files/energy.swf http://www.science-animations.com/support- files/energy.swf Click on “Fall”“Slide” “Swing” & “Spring” Click the green play button at the bottom.

8. That’s It Start the Energy Skate Park Lab!!!