A space craft of mass M is moving with velocity V and suddenly explodes into two pieces. A part of it of mass m becomes at rest, then the velocity of other part will be

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MVM−m

MVM+m

mVM−m

(M+m)Vm

answer is A.

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Detailed Solution

After explosion m mass comes at rest and let Rest (M−m) mass moves with velocity v.By the law of conservation of momentum MV=(M−m)v⇒v=MV(M−m)

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