THERE IS AN ERROR AT 6:50, THE FIRST COMPONENT SHOULD BE NEGATIVE (CLOCKWISE)
Replace the force system acting on the beam by an equivalent resultant force and couple moment at point A. (Figure 1) Take F1 = 290 lb, F2 = 330 lb, and F3 = 280 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.
Determine the couple moment at point A.
Express your answer in pound-feet to three significant figures. Enter positive value if the moment is counterclockwise and negative value if the moment is clockwise.

Problem from Engineering Mechanics Statics, Fifteenth Edition.