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posted by kyla on Tuesday, November 8, 2011 at 8:43pm.
a rock is dropped off a cliff. after 4s, what is the rocks velocity? how far did the rock fall?
1. Vf = Vo + gt, Vf = 0 + 9.8*4 = 39.2m/s. 2. d = Vo*t + 0.5g*t^2, d = 0 + 4.9*4^2 = 78.4m.
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