1. The problem statement, all variables and given/known data I need some help solving this question, it is the last one I have to do and I'm not sure how to solve it. A point charge (m = 1.0 g) at the end of an insulating string of length 53 cm is observed to be in equilibrium in a uniform horizontal electric field of 9000 N/C with the charge 1.0 cm above the lowest (vertical) position. If the field points to the right determine the magnitude and sign of the point charge. Find Magnitude in C: 2. Relevant equations T*cosTheta = mg T*sinTheta = F(elec) = qE 3. The attempt at a solution I found this question on a thread from a while ago but I'm not sure entirely what it is saying. Since I have those equations I need to solve for T in the first one to insert it in the second T*cosTheta = mg T=mg / Cos(theta) When I plug that into the second equation T*sinTheta = F(elec) = qE (mg/cosineTheta) * sineTheta = qE = F(elec) My question is, do I need all three parts of this last equation? Or can I simplify it to this: (mg/cosineTheta) * sineTheta = qE Even if I do this, how do I figure out the angle? And in this case what does E represent?