A point charge of +Q is placed at the center of a square, and
z s z(o 4yz02aiwlu)vdg: 4yj(c1unm, 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 ce
v:0gm(a4)wizzn2(cu4 s u o, zlyyd 1jnter. 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?