1. The problem statement, all variables and given/known data A charged cork ball of mass m is suspended on a light string in the presence of a uniform electric field, as shown in the figure below. When E = (Ai + Bj) N/C, where A and B are positive numbers, the ball is in equilibrium at the angle ?. b) Find the tension in the string. (Use any variable or symbol stated above along with the following as necessary: g for the acceleration due to gravity.) Here's the picture btw: http://www.webassign.net/pse/p23-55.gif 2. Relevant equations Not really sure. 3. The attempt at a solution I thought I had the answer with (mg)/(-B/A)sin(theta)+cos(theta)...but webassign tells me it's wrong. This is my last problem, and I guess I'm just fried for the day, as it doesn't seem too hard. I have half an hour to submit the answer. Help would really be appreciated.