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Homework Help: Solving for position please help

  1. Sep 12, 2010 #1
    Solving for position.... please help

    1. The problem statement, all variables and given/known data
    A particle's position on the x-axis is given by the function f(x) = (t^2 - 2t +4) where t is given in s. Where is particle at v= 4m/s?

    2. Relevant equations
    f(x) = (t^2 - 2t +4)
    sf = si + vi(tf -ti) + .5a(tf-ti)^2

    3. The attempt at a solution
    d/dx f(x)= 2t - 2 = 4
    2t = 6
    t = 3
    sf= 0 + 0(3) + .5(4/3)(3^2)
  2. jcsd
  3. Sep 12, 2010 #2


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    Re: Solving for position.... please help

    Welcome to Physics Forums :smile:

    Looks good so far.
    Where does that come from? Just use the f(t) given in the problem statement and the value of t you found.
    Last edited: Sep 12, 2010
  4. Sep 12, 2010 #3
    Re: Solving for position.... please help

    Thank you so much. That worksed perfectly now.
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