Civil Engineering - UPSC Civil Service Exam Questions - Discussion

47. 

A heavy elastic ball drops from the ceiling of a room, and after rebounding once from the floor, reaches a height equal to three-fourth of that of the ceiling. The coefficient of restitution will be

[A].
[B].
[C].
[D].

Answer: Option B

Explanation:

No answer description available for this question.

Shubhajit said: (Sep 26, 2018)  
Please explain this.

Hari said: (Mar 7, 2019)  
The coeff of restitution = vel of separation/vel.of approach = √(1.5xgxh/2xgxh) = √(3/4).

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