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What is the electric potential energy?

  1. Oct 21, 2010 #1
    Two protons are a distance 610–9 m apart. What is the electric potential energy of the system consisting of the two protons?

    Uelec = (1/4piepsilonnot)*q1q2/r
    where (1/4piepsilonnot) = 9x10^9 n*m/coulomb^2

    The mass of the proton is 1.7*10^-27
    for my answer i got 4.335e-36 but its wrong can someone help me out here?
  2. jcsd
  3. Oct 21, 2010 #2


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    Homework Helper
    Gold Member

    You'll have to show your work.

    What is the charge of a proton, by the way? (You're supposed to find the electrical potential energy, not the gravitational potential energy. :wink:)
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