Replace the force system acting on the frame by an equivalent resultant force - 4-139

Replace the force system acting on the frame by an equivalent resultant force, and specify where the resultant's line of action intersects member AB (Figure 1). Suppose that F1 = 60 lb, F2 = 80 lb, and F3 = 90 lb. Determine the magnitude of the resultant force. Express your answer in pounds to three significant figures. Determine the angle between the resultant force and the x axis. Express your answer in degrees to three significant figures. Specify where the resultant's line of action intersects member AB, measured from point A. Express your answer in feet to three significant figures. Problem from Engineering Mechanics Statics, Fifteenth Edition.