1. The problem statement, all variables and given/known data Five point charges on a straight line are seperated by a distance of 0.01 m. For what values of q2 and q4 would the net force on each of the other three charges be zero? q1-----q2-----q3-----q4-----q5 Where: q1= 2x10^-6 C q3= 1x10^-6 C q5= 2x10^-6 C 2. Relevant equations Force = (q1q2K)/r² Where q are the charges, K is a constant (8.99x10^9) and r is the distance between the charges. The problem is solved using a free body diagram and a summation of forces. 3. The attempt at a solution I have no idea as to how to approach this problem, I'm not looking for a full solution but for some advice. My main questions are; how do I deal with the forces and their directions? Then how can I use algebra to optain the values of q2 and q4? Thanks!