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Homework Help: Circular motion: Tension

  1. Feb 5, 2009 #1

    TG3

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    1. The problem statement, all variables and given/known data
    A 670 gm rock is whirled on the end of a string 44 cm long which will break under a tension of 24 N.
    What is the highest speed the rock can be twirled before it breaks?

    2. Relevant equations
    Centripital Acceleration = velocity ^2 / radius
    F=MA

    3. The attempt at a solution
    F = M A
    24 = .67 x (V^2 / R)
    24= .67 x (v^2 / .44)
    7.0752 = V^2
    2.6599 = V

    What am I doing wrong?
     
  2. jcsd
  3. Feb 5, 2009 #2
    That is not the value I receive. Check your calculation again.
     
  4. Feb 5, 2009 #3

    TG3

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    Ha ha... wow. I feel dumb now. Thanks....
     
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