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Rearranging equations

  1. Jun 14, 2010 #1
    1. The problem statement, all variables and given/known data
    I need to rearrange the following equation for T. I haven't done this for so long, that it has slipped my mind.

    2. Relevant equations
    change in y = Voy t - 1/2 g t2

    3. The attempt at a solution
    t = (change in y + 1/2) / (Voy - g)

    I know this is completely wrong, but I can't, for the life of me, figure it out. :/
  2. jcsd
  3. Jun 14, 2010 #2


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    Homework Helper

    So you have Δy= v0t-1/2gt2

    this can be written as 1/2gt2-v0t+Δy = 0

    doesn't this look similar to at2+bt+c=0?

    now apply the quadratic equation formula.
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