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Question: Answered & Verified by Expert
A 1.0 kg ball drops vertically into a floor from a height of 25 cm. It rebounds to a height of 4 cm. The coefficient of restitution for the collision is
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Options:
  • A 0.16
  • B 0.32
  • C 0.40
  • D 0.56
Solution:
1185 Upvotes Verified Answer
The correct answer is: 0.40
Initial velocity before colliding floor u=2gh
u=5
final velocity after colliding floor v=2gh
v=0.8
We know that coefficient of restitution e=vu
e=0.85=0.4

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