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KVPY2012PhysicsCenter of Mass, Momentum and Collision

A ball of mass m suspended from a rigid support by an inextensible massless string is released from a height h above its lowest point. At its lowest point it collides elastically with a block of mass 2 ~m at rest on a frictionless surface. Neglect the dimensions of the ball and the block. After the collision the ball rises to a maximum height of -

Options

  1. Ah / 3
  2. Bh / 2
  3. Ch / 8
  4. Dh / 9

Correct answer

D. h / 9

Step-by-step solution

Using energy conservation and law of restitution and momentum conservation

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