1.

A bullet of mass 50 g leaves a rifle at an initial velocity of 2000 m/s and strikes the earth at the same level with a velocity of 1000 m/s. The work done in overcoming the resistance of air will be

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A bullet of mass 50 g leaves a rifle at an initial velocity of 2000 m/s and strikes the earth at the same level with a velocity of 1000 m/s. The work done in overcoming the resistance of air will be



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