A boy on a bridge throws a stone vertically downward with an initial speed of (14.7 mathrm{~m}

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A boy on a bridge throws a stone vertically downward with an initial speed of \(14.7 \mathrm{~m} / \mathrm{s}\) toward the river below. If the stone hits the water \(2.00 \mathrm{~s}\) later, what is the height of the bridge above the water?

THINKING IT THROUGH. This is a free-fall problem, but note that the initial velocity is downward, which is taken as the negative direction. It is important to express this factor explicitly. Draw a sketch to help you analyze the situation if needed.

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