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A bouncing ball

This animation shows a ball being thrown up and the falling down so that it bounces off a hard surface. Some energy is lost at each bounce and so the ball eventually comes to rest.

The velocity of the ball is reduced by 10% at each bounce - rather like a power ball. To make the animation easier to follow the value of the acceleraton due to gravity (g) has been reduced.

The amount of energy lost depends on the coefficient of restitution between the two surfaces. This quantity depends on BOTH surfaces.

In this example it is defined as (height after a bounce/height before a bounce)1/2.
© Keith Gibbs/John Bourne 2012