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JEE Main Physics question

PhysicsSystems of Particles and Rotational MotionJEE Main

A bullet of mass m moving with velocity v strikes a suspended wooden block of mass M. If the block rises to a height h, the initial velocity of the bullet will be

Answer: (B)

Solution

The combined block+bullet system rises to height h, so its speed just after the (perfectly inelastic) collision is V = √(2gh)

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Question ID VK-154193