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Differentiating electrostatic force

  1. Feb 13, 2013 #1
    1. The problem statement, all variables and given/known data
    Obtain an expression for the potiential energy between to particles in an ionic bond at radius r0


    2. Relevant equations
    Coloumb's laws: F = (-k * q1 * q2)/r-1


    3. The attempt at a solution
    I think that if i do U = r00 F(r)dr = [k * q1 * q2 * r-1]r00 = k * q1 * q2 * r0-1, Then thats the answer, but i'm not sure and i don't have the actual answer available. Any help would be appreciated :)
     
  2. jcsd
  3. Feb 13, 2013 #2

    tms

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    You'd better take a second look at Coulomb's law.
     
  4. Feb 13, 2013 #3

    BruceW

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    Homework Helper

    well, if you want to get an answer using the (non-quantum) coulomb interaction, then you are on the right track. Your answer is not quite right. Think about what the distance is, when the potential is zero. (There is a convention to this). And this choice will influence your decision of the limits of your integral.
     
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