Question: A ball is dropped from rest from a height h above the ground. Another ball is thrown vertically upwards from the ground at the instant

A ball is dropped from rest from a height h above the ground. Another ball is thrown vertically upwards from the ground at the instant the first ball is released. Determine the speed of the second ball if the two balls are to meet at a height h/2 above the ground.

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Introductory Classical Mechanics 1st edition by David Morin