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Physics 13 Online
OpenStudy (anonymous):

a boy throws a ball to a height of 30m. with what velocity was the ball thrown? how long was the ball in the air?

OpenStudy (anonymous):

(1/2) v^2 = g h 0 = v t - (1/2) g t^2 at 30m time = 2 t as the time down is same as time up

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