1. The turnbuckle is tightened until the tension in cable AB is 1.2 kN. Calculate the magnitude of the moment about paint D of the force acting on point A. _ .. - -. _ ,/ \"Jr ark-n1.\" q \"-;r_..""' 4. Determine the vector expression for the \"3'1\"\" moment of the 1.2-kN tension (3} about point 0 and (b) about the pole z-axis. Find each moment in two different ways. 2. From the right-angle pipe shown. Replace the 750N tensile force which the cable exerts on point B by a force c0up|e system at point 0. 3. Compute the moment of the 0.4-lb force about the pivot O of the wall-switch toggle. F = 0.4 1b K10 A 30 O