Vote here: http://www.communitycounts.com/forum/?idphylm This Demo is Dangerously-Stupid. Don't try this at home. From http://www.slightlymadscience.com. Potential Energy: PEmgh. The energy stored by moving a mass to a height above the surface of the earth, which turns into Kinetic Energy when dropped due to the force of Gravity. That's all well