Posted by ray on Sunday, September 9, 2012 at 12:37am.
Solve this equation for t:
height = 0 = 9.31 + 3.06 t - (g/2) t^2
= - 4.9 t^2 + 3.06 t + 9.31
There will be two answers since this is a quadratic equation. Take the positive one.
t = (-1/9.8)[-3.06 - sqrt[(3.06)^2 + 182.5)]
= 1.726 s
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