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Potential and Kinetic Energy How is all energy divided? All Energy Potential Energy Gravitation Potential Energy Elastic Potential Energy Kinetic Energy Chemical Potential Energy What is Potential Energy? o Energy that is stored and waiting to be used later What is Gravitational Potential Energy? o Potential energy due to an object’s position Don’t look down, Rover! Good boy! o P.E. = mass x height x gravity What is Elastic Potential Energy? o Potential energy due compression or expansion of an elastic object. Notice the ball compressing and expanding What is Chemical Potential Energy? o Potential energy stored within the chemical bonds of an object What is Kinetic Energy? o Energy an object has due to its motion o K.E. = .5(mass x speed2) THE TRADE OFF Between Potential & Kinetic Energy Law of Conservation of Energy- Energy can neither be created nor destroyed. Energy is always changing from one kind to another. The total energy of an object never changes. Conservation of energy states that Ki + Pi = Kf + Pf . This simply means that the sum of the skiers initial potential and kinetic energy is equal to the sum of the skiers final potential and kinetic energy.