Three point charges are arranged on a line. Charge q3 = +5.00nC and is at the origin. Charge q2 = -4.00nC and is at x = 4.50cm . Charge q1 is at x = 2.00cm.
What is q1 (magnitude and sign) if the net force on q3 is zero?
The Attempt at a Solution
So first thing I did was draw a diagram where q3 was located at (0,0) q1 at (2.00cm,0) and q2 was located at (4.50cm,0)
Then after looking at the problem for a while I know I must use coulomb's law however since the net for q3 is 0 that threw me off a bit.
So what I decided to do was make two separate coulomb's law equations and equal them to each other.
Ultimately solving for q1 gives.
Not sure if I'm on the right track just brainstorming, much help is appreciated