A basketball is tossed vertically up into the air from the edge of a roof 8.5 m above the ground. First, if the ball took 1.6 seconds from the point when released upward until it hit the ground, what was the ball's initial speed? Second, what was the greatest height reached by the ball with respect to the roof? Ignore air resistance and use a value of g = 10.0 m/s when answering this question.
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