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Centripetal Tension?

  1. Feb 11, 2008 #1


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    1. The problem statement, all variables and given/known data

    A 35kg boy is swinging on a rope 7 m long. He passes through the lowest position with a speed of 3 m/sec. What is the tension in the rope at that moment?

    2. Relevant equations


    3. The attempt at a solution


    The correct answer is supposed to be 388 though.
  2. jcsd
  3. Feb 11, 2008 #2


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    Remember there is also the weight of the boy
  4. Feb 11, 2008 #3


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    Oh...yeah...thanks! That does it. 45+35*9.8=388.
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