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Arock is thrown vertically upward with a speed of 18.0 m/s from the roof of a building that is 50.0 m above the ground. assume free fall : part a) in how many seconds after being thrown does the rock strike the ground? part b) what is the speed of the rock just before it strikes the ground?
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Arock is thrown vertically upward with a speed of 18.0 m/s from the roof of a building that is 50.0...
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