derivation of kinetic energy and potential energy class 9th
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Work done = Final K.E. - Initial K.E. The work done by a force is a measure of the change in kinetic energy of the body which proves the work-energy principle.
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A nail is driven into a wooden block on the amount of kinetic energy of the hammer striking the nail.A baseball thrown by a pitcher has a small mass but a large amount of kinetic energy due to high velocity.
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