A bolt is dropped from a bridge under construction,
Chapter , Problem 52(choose chapter or problem)
A bolt is dropped from a bridge under construction, falling 90 m to the valley below the bridge.
(a) In how much time does it pass through the last 20% of its fall? What is its speed
(b) when it begins that last 20% of its fall and
(c) when it reaches the valley beneath the bridge?
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