Asked by Mike

A stone is thrown up and returns to it's starting point 6 second later. Find the stone's initial speed.
Answered by Henry
Tr = 6/2 = 3 s. = Rise time.

Vf = Vo + g*Tr = 0 @ max h.
Vo - 9.8*3 = 0.
Vo = 29.4 m/s.

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