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What states the law of conservation of mechanical energy?

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Mechanical energy is kinetic energy, KE, and various kinds of potential energy, PE. It is only conserved in processes where particles or objects don't touch each other, or, if they do, there is no friction, and all collisions are elastic. read more

The law of conservation of energy states that in a closed system the total amount of energy is conserved and does not change. This means that energy may change from one form to another, but that the total amount of energy in the closed system remains constant. read more

In physics, the law of conservation of energy states that the total energy of an isolated system remains constant—it is said to be conserved over time. Energy can neither be created nor destroyed; rather, it transforms from one form to another. read more

In physics, if you know the kinetic and potential energies that act on an object, then you can calculate the mechanical energy of the object. Imagine a roller coaster car traveling along a straight stretch of track. The car has mechanical energy because of its motion: kinetic energy. read more

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