A point charge of +Q is placed at the center of a square, and a
izvgicy9u 5y(avh ;0u 6cc9cfx (4 8zisecond point charge of -Q is placed at the upper-left corner. It is observed that an electrostatic force of 2.0 N acts on the positive charge at the cent
4z(6 zvfiy yh 5ug0;u8aicxvc9icc9(er. What is the magnitude of the force that acts on the center charge if a third charge of -Q is placed at the lower-left corner?