A point charge of +Q is placed at the center of a square,
s0gaa9lqdr w4o 7pnw0,+hbst*fvn 6 x(/ 2tzp 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
wgn+b 9 datl7spr*q 2a/(t,n4 h6 ov sp0f0zwxthe 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?