## Question

###### A perfectly elastic ping-pong ball is dropped in vacuum from a height equal to ten times its radius onto a perfectly elastic fixed sphere of the same radius. Neglecting effects due to earth motion, estimate the largest number of bounces against the fixed sphere that the ball can be expected to make under optimum conditions of release.

A perfectly elastic ping-pong ball is dropped in vacuum from a height equal to ten times its radius onto a perfectly elastic fixed sphere of the same radius. Neglecting effects due to earth motion, estimate the largest number of bounces against the fixed sphere that the ball can be expected to make under optimum conditions of release.

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