Question

Honors Physics Question on Magnetism

I'm given a system like so:

Four systems are described below.

System	q1(C)	q2(C)	F(N)
A	16	3	3
B	-2	4	2
C	5	-5	5
D	1	2	2

I'm then asked to rank the systems in order of decreasing separation between the charges, and to indicate ties where appropriate.

I tried using the equation of F = (k*q_1*q_2)/r^2 and solved for r, but my ranking didn't work. I don't know if I am missing something or if I am just putting it in wrong.

Answer 1