Type of Energy

1. Type of Energy Energy Analogy Total energy in house Thermal (toaster) = Mechanical (blender) Chemical (food) Electrical (Xbox) Types of Energy Money like energy can be transferred from one type to another but there is still the same amount of money….ENERGY IS NEVER LOST NOR GAINED…JUST CHANGED Total Money Types of Money Silver coins = Travelers checks Cash(wallet) Bank account TWO MAIN FORMS OF ENERGY Potential Kinetic All PE is transferred to KE Potential Energy: Stored energy because of height or elasticity(springs and bands) Kinetic: the energy of movement, stored energy that has been changed to moving Math formula: KE= ½ Mass x Velocity2 KE= ½ m x v 2 Math formula: PE= Mass x gravity x Height Pe= mgh A 200 kg person is standing on a 100 meter cliff and they fall, how fast will they be going when their height is 0. A 200 kg person is standing on a 100 meter cliff, what is their potential energy in joules.? x ½ Mass=1/2 ( 200 kg) 100 kg = PE= KE= 200000 J Velocity 2 = x x PE Mass= 200 kg Height = 100 meters gravity= 10 m/s/s = V= 14 m/s 200000 j =100v2 V2= 2000 PE= 200000 Joules of energy Square root of 2000 Divide by 100