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Homework Help: Coulomb's law, one charge placed between two others

  1. Sep 11, 2010 #1


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    1. The problem statement, all variables and given/known data
    distance between two electrical charges q1=10nC, q2=16nC is 7mm , what force will act at third charge q3=2nC, placed between the first two charges 3mm far from the smaler charge and 4 mm far from the larger charge.

    2. Relevant equations

    3. The attempt at a solution
    then F=F1,3-F2,3=0,02N-0,018N=0,002N=2(mN)
    am I right?
    Last edited: Sep 12, 2010
  2. jcsd
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