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Mechanical Energy:
The mechanical energy of a system is the sum of the kinetic and potential energy within the system: mechanical energy = potential energy + kinetic energy. Mechanical energy is measured in units called joules. Objects with mechanical energy are either in motion(kinetic energy) or have stored energy(potential energy) to do work 

Read more: [|Mechanical Energy Facts for Kids | eHow.com] [|http://www.ehow.com/info_8520550_mechanical-energy-kids.html#ixzz1wMmEBdNa]



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