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A parachutist jumps from a balloon at the edge of space (so there is no air resistance). The height the parachutist jumps from rest at is 35,000 m above the ground. What is the speed of the parachutist (in m/s) by the time the parachutist gets down to an elevation of 10,000 m above the ground? Ignore air resistance at these high altitudes. Don't include units in your answer.
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Added Sun, 05 Jul '15
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distance travelled=35000-10000=25000

newtons third law v2=2gd=2*9.81*25000=490500

hence v=700.35
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Added Sun, 05 Jul '15
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