NEET UG PHYSICS MCQ: WORK-ENERGY-POWER

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A ball is bouncing down a flight of stairs. The coefficient of restitution is

e

. The height of each step is

d

and the ball descends one step each bounce. After each bounce it rebounds to a height

h

above the next lower step. The height is large enough compared with the width of step so that the impacts are effectively headon. Find the relationship between

h

and

d

View answer and explanation

Correct option: A

h=\frac{d}{1-e^2}

Option A (

h=\frac{d}{1-e^2}

) is correct because the height gained after each bounce is related to the height lost (d) by the coefficient of restitution.

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