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Homework Help: Centripetal acceleration

  1. Feb 6, 2008 #1
    1. The problem statement, all variables and given/known data

    I am having difficulty with a problem: A race care goes around a level, circular track with a diameter of 1.00 km at a constant speed of 90.0 km/h. Wha tis the car<s centripetal acceleration in m/s^2?

    2. Relevant equations


    3. The attempt at a solution

    I'm not quite sure if I'm supposed to find the radius of the 1.00 diameter or if I simply use the 1.00 km as my radius in the above equation...?
  2. jcsd
  3. Feb 6, 2008 #2


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    Homework Helper


    r=radius...so yes you must find the radius(which is half of the diameter!).
  4. Feb 6, 2008 #3


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    Staff Emeritus
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    Gold Member

    Radius is half the diameter.
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