1. The problem statement, all variables and given/known data Three point charges are located on the positive x-axis of a coordinate system. Charge q1 = 2.0 nC is 2.0 cm from the origin, charge q2 = -3.5 nC is 4.0 cm from the origin and charge q3 = 5.0 nC located at the origin. What is the net force ((a)magnitude and (b) direction) on charge q1 = 2.0 nC exerted by the other two charges?. 2. Relevant equations F= k (q1q2/r^2) 3. The attempt at a solution I know that the direction (b) is 0 degrees as all the points are all located on the x-axis, I just can't figure out part (a). I keep mixing up my diagram so that when the equation is applied, my answer comes out incorrectly. Any help would be great!