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Homework Help: Non-Uniform Circular Motion

  1. Sep 15, 2009 #1
    1. The problem statement, all variables and given/known data
    A car starts from rest on a curve with a radius of 190 m and accelerates at 1.20 m/s^2 . How many revolutions will the car have gone through when the magnitude of its total acceleration is 3.10 m/s^2 ?


    2. Relevant equations
    A^2=At^2 + Ac^2
    Ac=v^2/r
    x=(1/2)at^2
    Vf=at


    3. The attempt at a solution
    3.1^2=1.2^2+Ac^2
    Ac=2.85

    2.85=v^2/190
    v=23.304

    23.304=1.2t
    t=19.42

    x=(1/2)(1.2)(19.42)^2
    x=226 (wrong)
     
  2. jcsd
  3. Sep 16, 2009 #2

    ideasrule

    User Avatar
    Homework Helper

    Did you forget to convert 226 m to the number of revolutions?
     
  4. Sep 16, 2009 #3
    LOL thanks!
     
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