Question: 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

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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