InterviewSolution
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InterviewSolution
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A girl throws a ball with an initial velocity v at an angle `45^@`. The ball strikes a smooth vertical wall at a horizontal distance d from the girl and after rebound returns to her hands. What is the coefficient of restitution between wall and ball ? `(v^2 gt dg)`A. `v^(2) -gd)`B. `(gd)/(v^(2)-gd)`C. `(gd)/v^(2)`D. `v^(2)/(gd)` |
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Answer» Correct Answer - B `T = (d)/(v/sqrt(2)) + (d)/(ev//sqrt(2)) = (1+1/e)sqrt(d)/v)` or `(2v//sqrt(2))/g = (1+1/e)(sqrt(2d)/v)` or `e = (gd)/(v^(2)-gd)` |
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