Test Academy | A wooden block of mass M is suspended by a cord and is at rest. A bullet of mass m, moving with a velocity v pierces through the block and comes out with a velocity v / 2 in the same direction. If there is no loss in kinetic energy, then upto what height the block will rise m²v²/2M²g, m²v²/8M²g, m²v²/4Mg, m²v²/2Mg

Question

A wooden block of mass M is suspended by a cord and is at rest. A bullet of mass m, moving with a velocity v pierces through the block and comes out with a velocity v / 2 in the same direction. If there is no loss in kinetic energy, then upto what height the block will rise

Options :

m²v²/2M²g
m²v²/8M²g
m²v²/4Mg
m²v²/2Mg

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