a square metal plate 0.180 m on each side is pivoted about an axis through point o at its center and perpendicular to the plate (as shown in fig). calculate the net torque about this axis due to the three forces, shown in the figure if the magnitudes of the forces are f1=18.0 N, F2=26,0 N, and F3=14.0 N. the plate and all forces are in the plane of this page. F! 0180ml o 180m