1. The problem statement, all variables and given/known data Charges Q, Q, and q lie on the corners of an equilateral triangle with sides of length a. Charge q lies on the top corner with Q and Q on the left and right corners. (a) What is the force on the charge q? (b) What must q be for E to be zero half-way up the altitudeat P? 2. Relevant equations F=(1/4πε) * (q1q2/r2) E = (1/4πε) * (q/r2) 3. The attempt at a solution (a) F = qQ / (4πεa2) iy (b) Eq = q / (4πε (3/16 a2)) iy and EQ = Q / (4πε (7/16 a2)) iy I just wanted to know if the attempts are in proportion to the required? Thanks alot in advance.