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Question: Answered & Verified by Expert

Consider a rubber ball freely falling from a height h= 4.9 m onto a horizontal elastic plate. Assume that the duration of collision is negligible and the collision with the plate is totally elastic. Then the velocity as a function of time and the height as a function of time will be

PhysicsCenter of Mass Momentum and CollisionNEET
Options:
  • A
  • B
  • C
  • D
Solution:
2240 Upvotes Verified Answer
The correct answer is:
When rubber ball strikes the elastic surface, its velocity becomes negative after collision without change is speed. Since h is positive, thus initial velocity will be negative. Hence option (3) is correct.

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