1. The problem statement, all variables and given/known data A ring with a 15cm radius and with a uniform charge of 20 micro coulombs is in the yz-plane with the origin at its center. What is the force on a -3 micro coulombs charge on the x-axis at x=5cm? 2. Relevant equations E=kQx/(R^2 + x^2)^(3/2) F=QE 3. The attempt at a solution I tried to plug in the numbers for the above equations and can't seem to get the right answer. I first solved for E and then multiplied it to Q which is -3*10^(-6) C...correct? The answer should be -6.83 N, but I can't seem to figure it out.