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Homework Help: Two identical small metal spheres 3 cm apart

  1. Jan 25, 2012 #1
    1. The problem statement, all variables and given/known data
    Two identical small metal spheres 3 cm apart attract each other with a force of 150N electrical module. They are temporarily connected by a conducting wire, which is then removed, making both charges equal.

    a) Determine the initial electrical charges if they now repel each other with a force of 10N module.(It is assumed that the charge of each sphere is uniformly distributed)

    b) From a graphical analysis, show that if the repulsive electric force initial situation is unrealistic.


    2. Relevant equations
    Coulombs law


    3. The attempt at a solution
    673EBE9B.jpg
    Too much to copy, this is what i have... its french, I try to translate it as much as possible

    Also, the book indicated that the answer should be
    q1= +5μC
    q2= +3μC
     
  2. jcsd
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