The magnitude of the force F is 120 lb. Find its rectanguiar representation and the angles '91:; .953, 4:71 defining the direction of the force. F = 63.0 I 52.54; 87.56 i5 e. : 58.33\"; a}. : 115.96\" ,- 9.. : 136.86\" Three ropes are attached to the post at A in the figure. The forces in the ropes are F1=260 lb, F2=75 lb and F3260 lb. Determine the magnitude of the force R that is equivalent to the three forces shown. F; 2 F. + F; + F; : ems t _. 3oof+ 14o E I