Physics

A stone is thrown directly upward from rest from ground level with initial speed 20.0
m/s; 1.50 s after that, a second stone is thrown directly upward from ground level with initial
speed 18.0 m/s. (a) When are the stones at the same height? (b) What are the velocities of the
stones when they meet, in m/s?

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asked by Nick

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