A tennis ball with (small) mass m(2) res...

A tennis ball with (small) mass `m_(2)` rests on the top of a basketball of mass `m_(1)`which is at a height `h` above the ground, and the bottom of the tennis ball is at height `h+ d` above the ground. The balls are dropped. To what height does the tennis ball bounce with respect to ground? (Assume all collisions to be elastic and `m_(1)gt gt m_(2))`

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