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A ball is dropped from 15.6 ft above the ground. Assume that air-drag is negligible in...

A ball is dropped from 15.6 ft above the ground. Assume that air-drag is negligible in this case.

(a) At what height is half of its energy kinetic and half potential?

ft

(b) Using energy considerations only, what is the velocity of the ball just as it hits the ground?

ft/s

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