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Homework Help: Acceleration in Uniform Circular Motion

  1. Sep 29, 2011 #1
    1. The problem statement, all variables and given/known data

    What is the acceleration (in m/s^2) of a 10 kg mass moving with speed 2 m/s in uniform circular motion about a circle of radius 2m?

    2. Relevant equations

    a=v^2/r in uniform circular motion

    3. The attempt at a solution

    Seems simple enough. To find the acceleration I simply squared the speed and divided by the radius. 2^2/2=2m/s^2.

    This was graded as incorrect. What am I doing wrong? Am I confusing speed and velocity? Please help!
  2. jcsd
  3. Sep 29, 2011 #2

    Doc Al

    User Avatar

    Staff: Mentor

    Looks fine to me. Was that the entire question?
  4. Sep 29, 2011 #3
    Yup. I think the professor may have made a mistake. I'll take it to him. Thanks!
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