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Homework Help: A car starts from rest

  1. Sep 8, 2011 #1
    1. The problem statement, all variables and given/known data

    A car starts from rest, accelerates at a constant rate, has a displacement of x and a final velocity of v. What is the final velocity (in terms of v) if the displacement was 9x?

    2. Relevant equations
    v^2=vo^2 + 2a(x-xo)


    3. The attempt at a solution
    I have no idea. :(
     
  2. jcsd
  3. Sep 8, 2011 #2

    lewando

    User Avatar
    Homework Helper
    Gold Member

    Hello KJD, welcome to PF! You must have some idea! :smile:.
    Seems like a 2-part problem. First find v, given:
    What would v be in this case, using the equation you provided?

    Now, jack up x by 9, using your result from the first part. Does this help?
     
  4. Sep 8, 2011 #3
    Thank you so much! I think I understand now! I just didn't know where to start. Thanks again :smile:
     
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