A point charge of +Q is placed at the center of a square, a
iru *-y3gdvvdh3 xjyyxo. pm p2-xo9m+iy8/1nd a second point charge of -Q is placed at the upper-left corner. It is
3jdvyi1-m+y9 o dpxv -gpir ouy8.3mh2 xx*/y 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 acts on the center charge if a third charge of -Q is placed at the lower-left corner?