A line of positive charge is formed into a semicircle of radius R = 57.4cm, as shown in the figure below. The charge per unit length along the semicircle is described by the expression A(0) = Xocose. The total charge on the semicircle is 12.6uC. Calculate the value of the constant o. Submit Answer Tries 0/10 Calculate the magnitude of the total force on a charge of 2.97uC placed at the center of curvature. Submit Answer Tries 0/10 R x