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Three charges q, uniform circular motion

  1. Jan 22, 2014 #1
    1. The problem statement, all variables and given/known data

    Two spheres have a charge of q a stationary sphere between them has a charge of -q. The 2 positive spheres move like conical pendulums at a constant velocity of 12.0m/s in uniform circular motion. What is the magnitude of charge q?

    2. Relevant equations

    Electric Force = kq1q2/(r^2)
    (mv^2)/r = Centripetal Force
    Fg = mg

    3. The attempt at a solution

    I did some calculations but found difficulty because I don't know that mass of the two side spheres were.
    1. The problem statement, all variables and given/known data

    2. Relevant equations

    3. The attempt at a solution

    Attached Files:

  2. jcsd
  3. Jan 22, 2014 #2


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    Homework Helper

    I would call them 1kg, to get a solution ; later you change them to ½kg, or "m"
    (the charge will or course be different; this will get you the dependence on m)
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