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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?



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Coefficient of restitution is = V / U = e
 V / U  = velocity before bouncing / volocity after bouncing

   = √H2 / √H1  = √ (height after bouncing / height before bouncing)
    = √(3/4)  = √3/2 = 0.866

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