Question

The ball is bouncing down a flight of stair. the coefficient of restitution is e. The higher of each step is' and ball descends one step in each bounce. After each bounce is rebounded to a height 'h' above the next lower step. The height is large enough compared with the width of the step so that the impacts are effectively head-on. The relation between 'h' and 'd' is

• A. $h=\frac{d}{1-e^2}$
• B. $h=\frac{d}{1+e^2}$
• C. $h=\frac{d}{1+e}$
• D. $h=\sqrt{\frac{d}{1-e^2}}$

Answer 1

The correct option is A $h=\frac{d}{1-e^2}$