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A stone is thrown vertically upward with a certain velocity from a bridge 35.7m above the...

A stone is thrown vertically upward with a certain velocity from a bridge 35.7m above the water and then drops into a river. Another stone is dropped into the water 2.5s after the first is thrown. The stones strike the water at the same time. (a) What is the initial speed of the first stone? (b) Plot velocity versus time on a graph for each stone, taking zero time as the instant the first stone is thrown.

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