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A 10kg mass, initally at rest, is dropped from a height of 15 meters above the horizontal. Determine the mass: a) original Pe; b) the mass velocity at impact; with the ground; and c) time to hit the ground.

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A 10 kg mass, initially at rest, is dropped from a height of 15 meters above the horizontal. Detemine the mass': (a) original Pe; (b) the mass' velocity at impact; with the ground (hint: hy = 0); and (c) time to hit the ground.