Three charges reside on an equilateral triangle with sides equal to d. All three charges are equal in magnitude and sign. What is the magnitude of the force F' on one of the three charges q due to the total electric field from the other two charges q on the corners of the equilateral triangle? Okay, so this problem is driving me nuts because I cannot get the correct solution, which by the way is 1407 Newtons. q=60 micro C and d=20 cm. I tried to find the force of the one charge due to other two charges by using coulomb's law, and the direction, but I couldn't seem to get it. Any help is greatly appreciated.