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Rearranging equations.

  1. Oct 7, 2009 #1
    1. The problem statement, all variables and given/known data

    Rearrange d=vit + 1/2 at^2 for t.

    3. The attempt at a solution

    t = \frac{-v \pm \sqrt{v^2+4 \left( \frac{1}{2} a\right)d}}{2 \left( \frac{1}{2} a \right)}
  2. jcsd
  3. Oct 7, 2009 #2


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    Very hard to read that - but it looks pretty good. I get
    t = (-Vi + sqrt(x))/a or (-Vi - sqrt(x))/a
    where x = Vi^2 + 2*a*d
    I've never seen that formula used - it is just easier to use two of the others to do the job.
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