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OpenStudy (anonymous):
You drop a rock down a well that is 11.5 m deep. How long does it take the rock to hit the bottom of the well? A. 2.8 s B. 2.3 s C. 1.5 s D. 3.1 s
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OpenStudy (irishboy123):
use: x = ut + (1/2) g t ^2 x = 11.5 u = initial velocity = 0 solve for t
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