santi14 santi14

03-02-2017
Physics

contestada

A rock falls off the edge of a cliff that is 145 m above the ground beneath it. For how long a time is the rock falling? Assume air resistance is negligible

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jamesbond3147 jamesbond3147

03-02-2017

earth gravity is 9.8 m per second so 145m/9.8=14.8 seconds to fall.

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