1. Limited time only! Sign up for a free 30min personal tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Homework Help: 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

    rock.freak667

    User Avatar
    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.
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook