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Homework Help: Finding initial velocity

  1. May 12, 2009 #1
    1. The problem statement, all variables and given/known data

    A car accelerates at 1.65 m/s2 along a straight road. It passes two marks that are 30 m apart at times 2.4 s and 4.8 s. What was the car's initial velocity?

    2. Relevant equations

    Need help starting this problem?
    3. The attempt at a solution
  2. jcsd
  3. May 12, 2009 #2
    Well you should list some relevant equations. Here is what you know: a, x, and change in time. And you want to know v_0.

    So in your list of kinematic equations, do you have an equation that has all 4 of those variables?
  4. May 13, 2009 #3
    v = vo + at
    s = 1/2 at2
    v2 = v02+2as

    choose one
  5. May 13, 2009 #4
    Your 2nd equation you listed is inaccurate TaiwanCountry. You forgot to mention the initial velocity in that equation.
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