(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

q1 = 4 mC at the origin

q2 = 2 mC at x=1.0m y=0.0m

q3 = 1 mC at x=1.0m y= 1.0m

q4 = 3 mC at x=0.0m y= 1.0m

What is the net force on q2? Give magnitude and direction of the force.

2. Relevant equations

E = kq/r^2

E = F/q

3. The attempt at a solution

Ok after plotting the locations of all 4 charges on a graph, you see that it makes up a square. So to find each electric field, i plugged in k, which is 9*10^9, r, which for q1 would be 1 because that's the distance charge q1 is from q2. By doing this for all 4 charges, i get the magnitude of each electric field.

The problem is, I'm not sure what to input for q2 as the distance is 0 (r=0) and you can't divide by 0. I'm also sure unsure whether or not charge q2's electric field has any effect on the other charges.

What I planned to do to solve the problem was to find each electric field and plug it into E = F/q to find the force and add them up to find net force, but I'm stuck on the steps mentioned.

Any help would be appreciated, thanks.

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# Homework Help: Point Charges

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