# Physics

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Omar throws a rock down with speed 12 m/s from the top of a tower. The rock hits the ground after 2.0 s. What is the height of the tower? (air resistance is negligible)

• Physics -

hf=hi+vi*t+1/2 g t

hf=0, Vi=-12, g= -9.8m/s^2 solve for t.

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