A baseball is thrown from the roof of a 22.0 m building withan initial velocity of magnitude 12.0 m/s and directed at an angleof 53.10 above the horizontal. (a) What is thespeed of the ball just before it strikes the ground? (b) What isthe answer for part (a) if the initial velocity is53.1o below the horizontal? Use EnergyConservation Principle and ignore air resistance.
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