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Homework Help: Potential Energy of two small metal speheres

  1. Sep 14, 2010 #1
    1. The problem statement, all variables and given/known data

    Two small metal spheres, A and B, of mass mA = 6.5 g and mB = 12.7 g have equal positive charges of 8 μC. The spheres are connected by a non-conducting string of negligible mass and with length d = 1.4 m, which is much greater than the radii of the spheres.

    a) What is the electrical potential energy of the system?

    b) Suppose you cut the string. At that instant, what is the acceleration of each sphere?

    2. Relevant equations

    Coulomb's Law

    3. The attempt at a solution

    I can't figure it out
  2. jcsd
  3. Sep 14, 2010 #2


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    Homework Helper

    That's not an attempt. Surely you must have done something? Or do you at least have some idea of what concepts might be relevant, and how you might use them?
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