A point charge of +Q is placed at the center of a sq
/zg9apg8 - gg(gd:iz xuare, and a second 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 center. What is the magnitude of the force that a
a zg-gz(8xgd:pig /g9cts on the center charge if a third charge of -Q is placed at the lower-left corner?