But I thought this was one of those that you don't really do work - it's logic. Say Q is 2. q has to be -2. Q/q=-1? But that's not right either...
I tried figuring it out this way:
The distance from particle 1 to 4 is sqrt(2a^2), so the force there is k(2Q/(sqrt(2a^2)^2) which simplifies...
I apologize in advance - I am completely clueless about this one. I thought I had it figured out, but it turns out that I think I don't know where to even start.
Four particles form a square. The charges are q1 = q4 = Q and q2 = q3 = q. What is Q/q if the net electrostatic force on particles...