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Homework Help: Object swung in cylinder

  1. Feb 20, 2010 #1
    A 2.91 kg object is swung in a vertical circular
    path on a string 3.94 m long.
    The acceleration of gravity is 9.8 m/s2 .
    If the speed at the top of the circle is 7 m/s,
    what is the tension in the string when the
    object is at the top of the circle?

    can you show the formulas needed to get to the answer? Thanks a lot
     
  2. jcsd
  3. Feb 20, 2010 #2

    ideasrule

    User Avatar
    Homework Helper

    Re: Tension

    Here they are:

    F=ma
    Fc=mv^2/r
    Fg=mg
     
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