Given total charge, find individual charges.

  • #1

Homework Statement



A total charge of 7.47x10^-6 C is distributed on two different small metal spheres. When the spheres are 6.35 cm apart, they each feel a repulsive force of 15.5011 N. How much charge is on each sphere?

Homework Equations



F=k Qq/r^2
Q1+Q2=7.47x10^-6C

The Attempt at a Solution


Using the second equation, I put the first equation in terms of Q1 to get F=k Q1(7.47X10^-6 - Q1)/r^2, but I cannot solve for Q1
 

Answers and Replies

  • #2
kuruman
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Using the second equation, I put the first equation in terms of Q1 to get F=k Q1(7.47X10^-6 - Q1)/r^2, but I cannot solve for Q1
Why not? It's a quadratic equation.
 

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