An athlete throws the shot put (a heavy metal ball) with an initial speed of v_{0}*m / s at 45 deg above the horizontal from the ground level. If the ball is in flight for 2.16 s before hitting the ground, what is the intial speed ? v_{o} A.15m/s. B.24m/s. C.11m/s. D.55m/s E.21m/s

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