posted by Terri .
Two point charges, one of +3.00 10-5 C and the other -5.00 10-5 C are placed at adjacent corners of a square 1.400 m on a side. A third charge of +5.70 10-5 C is placed at the corner diagonally opposite to the negative charge. Calculate the magnitude and direction of the force acting on the third charge. For the direction, determine the angle the force makes relative to a line joining the first two charges.