Sam heaves a shot with weight 16-lb straight upward giving, Ask an Expert

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Sam heaves a shot with weight 16-lb straight upward, giving it a constant upward acceleration from rest of 45.9 m/s^2 for a height 61.0 cm. He releases it at height 2.10 m above the ground. You may ignore air resistance

A. How high above the ground does it go?

B. How much time does he have to get out of its way before it returns to the height of the top of his head, a distance 1.86 m above the ground?

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