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Homework Help: Uniform centripetal acceleration

  1. Dec 3, 2009 #1
    1. The problem statement, all variables and given/known data
    A small ball with a mass of 3.0kg revolves uniformly in a circle on a frictionless horizontal surface. The ball is attached to a string of 1.40m to a pin set at center of circle. The object makes 2rev/sec.

    a)find the centripetal accel
    b)find the tension exerted on the string

    2. Relevant equations

    Fc= ma=m(4pi^2r/T^2)
    T= .5

    3. The attempt at a solution
    if its uniform wouldnt the Fc=FT(force of tension)
    T would =.5 because 2 rev/1 sec?
    I am not sure how to find centripetal accel because i do not know how to find the velocity unless i am missing something..
    Last edited: Dec 3, 2009
  2. jcsd
  3. Dec 3, 2009 #2


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    If it makes one revolution and the string is 1.40 m, how much distance does it cover?
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