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A bullet of mass 4 grams and velocity of 400 meters per second hits a wooden...

A bullet of mass 4 grams and velocity of 400 meters per second hits a wooden box of mass 0.5 kg and emerges from the other end.(a) Find the velocity of the wooden box just after the bullet went through it.(b) How high does the wooden box swing?(c) What fraction of energy was lost as bullet went through the box?

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