3. A cork with charge -q and mass m is suspended from the ceiling by a string. A second cork, with charge q is placed on the floor, directly below the first cork, at a distance h from the first cork. See figure. If the magnitude of the tension force in the string is T =4mg , find h. Assume the suspended cork is in static equilibrium. The knowns are ke, q, m, and g. (15 points) ceiling gravity string - -q, m h + floor5. A square is placed in a coordinate system as shown in the figure below. The area charge density of the square is given by: o(y) =. - , where o and b are constants. Find the net charge on the square. The knowns are O and b. (15 points) o() dA 2b 2b r