A point charge of +Q is placed at the center of a square, and a seco
):rjvzy) 8am knd 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
)8)r z yam:vkj that acts on the center charge if a third charge of -Q is placed at the lower-left corner?