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2014-08-16T06:26:42+05:30

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We move or vehiccles move against friction force and move some distance. The product of friction force and distance moved gives the work done against friction.

This work done is same as the lost energy due to friction. It heats up the surroundings, contact surfaces. Some deformation of surfaces in contact may also happen. So work fone to deform the shape objects also comes from kineti c energy  of the moving vehicles.

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