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Most Important Selected Qs for JEE AdvancedPhysicsCenter of Mass, Momentum and Collision

A small sphere and a big sphere are released from rest with a very small gap from height h as shown in the figure. The mass of bigger sphere is very large as compared to mass of smaller sphere the height from the point of collision of smaller sphere with the bigger sphere to which the smaller sphere will rise if all the collisions are elastic

Options

  1. A2 h
  2. B4h
  3. C6h
  4. D9h

Correct answer

D. 9h

Step-by-step solution

conservation of momentum M 2 g h -m 2 g h =M V₁+m V₂ (1) -1= V₁-V₂ 2 2 g h (2) V₂=3 2 g h h^ = V₂^2 2 g =9 h

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