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Homework Help: Circular motion

  1. Aug 4, 2008 #1
    i hope the question is understood,

    the question is to prove that two masses hung from 2 strings, from the same point, at the same height from the ground, but on different length cords, can move with the same frequency, despite different lenghts

    what i think needs to be done, is prove that the frequency has nothing to do with the radius of the motion but with the velocity


    using equation for radial/centrepheutal force
    Fr=mar=sinB*t=m(ῳ^2)R
    t being tension
    R-radius--->tanB*h(height)

    sinB*t=m(ῳ^2)*tanB*h
    cosB*t=m(ῳ^2)*h

    ῳ=sqrt[mh/cosB*t]

    now im not sure what to do, i have proven nothing since B is directly affectd by the lenghth of the cord, am i correct?
     
  2. jcsd
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