Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Finding acceleration using velocity

  1. Sep 13, 2011 #1
    1. The problem statement, all variables and given/known data

    A race car starts from rest and travels east along a straight and level track. For the first 5.0 s of the car's motion, the eastward component of the car's velocity is given by vx(t)=(0.940 m/s3)t2
    2. Relevant equations

    I think I am suppose to use the equation x-x0=(v0+v)/2)t

    3. The attempt at a solution

    I know the givens are x0=0 and t=5.00s, but I don't know how to use vx to solve for acceleration. Thanks.

    You guys didn't happen to obtain7.46 m/s^2 as the answer, did you?
    Last edited: Sep 13, 2011
  2. jcsd
  3. Sep 13, 2011 #2


    User Avatar
    Homework Helper

    No, that relation is valid between displacement and velocity for a special kind of motion, what is it? Is it the same as the motion in the problem?

    Do you need to get the displacement or the acceleration?

    Hint: how is velocity and displacement related in general? How is acceleration defined?

  4. Sep 13, 2011 #3
    ok thanks! I just figured it out. =)

    the answer is 7.46 m/s^2.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook