Coefficient of restitution
The coefficient of restitution (COR) of two colliding objects is a positive real number between
and
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
with the floor falls free from the height of
the bounce height is
as above left(A). The above right(B) shows the bounce height
as a function of the drop height
What is
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Velocity just before striking ground v= 2 g h Velocity immediately after the bounce v' = 2 g h ′ e = v'/v = 2 g h ′ / 2 g h = h ′ / h = 0 . 6 4 / 1 .... from graph e = 0.8