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Finding the Original Charge Given Force

  1. Jun 23, 2017 #1
    1. The problem statement, all variables and given/known data
    Two small, identical conducting spheres repel each other with a force of 0.050 N when they are 0.25 m apart. After a conducting wire is connected between the spheres and then removed, they repel each other with a force of 0.060 N. What is the original charge on each sphere?

    2. Relevant equations
    F(r)= k|q1||q2| / r1 22

    3. The attempt at a solution
    So since the questions stated that the two spheres were identical, I went ahead and assumed that the two spheres had the same charge and using that along with the other information given, I solved using Coulumb's Law but I didn't even end up using the second part of the data given so I'm sure I messed up on my equation set up
     
  2. jcsd
  3. Jun 23, 2017 #2

    Orodruin

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    I believe the intention is that the charges are not identical in the beginning. If they were nothing would change when you connect them.
     
  4. Jun 23, 2017 #3
    Would it be safe to assume that the distance between them stays the same even after the force with which they repel each other changes?
     
  5. Jun 23, 2017 #4

    Orodruin

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    I would assume so, yes. There is nothing in the statement that would indicate a change in distance.
     
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