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Published byAdela Patrick Modified over 6 years ago

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Energy

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Energy & Work Closely related Energy: ability to do work Work: transfer of energy Both measured in Joules

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Energy Types 1.Kinetic Energy: Energy in motion 2.Potential Energy: Stored energy (not moving) depends on position or condition of object

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Examples of KE

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Examples of PE Firecracker Boulder on top of cliff battery

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Calculating KE KE = ½ mv 2 m = mass v = velocity Which increases kinetic energy more: doubling the mass or doubling the velocity?

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Gravitational PE PE that depends on object’s height, and weight G.P.E. = mgh m = mass g = 9.8 m/s 2 h= height. Which will have greater GPE: a rock on a 3 story ledge or a rock on a 20 story ledge?

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Mechanical Energy PE Converts to KE and vice versa Mechanical Energy = KE + PE –Total energy Skier Roller Coaster Dart

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Energy conversions Law of conservation of energy: Energy cannot be created or destroyed, only converted from one form to another

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