A bullet moving at the ratr of 75m/s is fired into a trunk of wood into which it penetrates 25 cm. If a bullet moving with same velocity were fired into a similar piece of wood 10 cm thick, with what velocity will it emerge, assuming the resistance to be uniform?
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A bullet moving at 250 m/s penetrates 5 cm into at tree limb before comign to rest. Assuming that the force exerted by the tree limbis uniform, find its magnitude. Mass of the bulet is 10 g.
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