Coefficient of restitution

The coefficient of restitution (COR) of two colliding objects is a positive real number between \(0.0\) and \(1.0\) representing the ratio of speeds after and before an impact, taken along the line of the impact. When a basketball which has the restitution coefficient of \(e\) with the floor falls free from the height of \(h,\) the bounce height is \(h'\) as above left(A). The above right(B) shows the bounce height \(h'\) as a function of the drop height \(h.\) What is \(e?\)

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