1. The problem statement, all variables and given/known data An electric field E=141000.0i N/C causes the 4.70 g ball in the picture to hang at a α=22.9° angle. What is the charge on the ball? 2. Relevant equations E=(1/4pieE)*(q/r^2) 3. The attempt at a solution I tried solving this question first by drawing a force diagram on the charged particle. On the diagram: W = T cos α -1 F = T sin α -2 I divided equation 2 by 1 I get tan α = F/mg ; since F = 1/4pie * q/r^2; i subbed it in therefore: mgtanα4pie*r^2 = q but i am having trouble in solving for r; i tried solving for r by using the Pythagorus theorem, but i didnt workout... i'm kinda stuck, i guess its because the known value for E field is in a component form... can someone please guide me through this question picture is attatched thanks in advance.