A bullet of mass 20 g leaves a riffle at an initial speed 100 m s and strikes a target at the same level with speed 50 m s The

Question

A bullet of mass 20 g leaves a riffle at an initial speed 100 m s and strikes a target at the same level with speed 50 m s The amount of work done by the resistance of air will be 1 100 J 2 25 J 3 75 J

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