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How much energy does friction take from a 0.77-kg book sliding across the floor if the...

How much energy does friction take from a 0.77-kg book sliding across the floor if the frictional force is -2.09 newtons and the book slides to a stop from 1.2 m/s?

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Answer #1

Energy is neither created nor destroyed it changes from one form to other. Thus this loss in kinetic energy is actually the energy taken up by the frictional force

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