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A body falls towards earth in air. Will ...

A body falls towards earth in air. Will its total mechanical energy be conserved during the fall ? Justify.

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No , because resistive forces of air also act on the body which are non - conservative forces . So the gain in KE would are non - conservative forces . So the gain in KE would be smaller than the loss in PE as part of energy is lost in overcoming the iar resistance . Therefore , total mechanical energy will not conserved .
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