PhanthomJay,Thank you very much,Considering what you said I used this formula to find each force and then The total force:
F * (sin or cos) * perpendicular distance = MomentF1 * sin90 * 2 = 110
F2 * sin78 * 5 = 161.39
F3 * sin42 * 3 = 148.54
-(F4) * cos77 * 2 = -30.59
the total force = 389.34...
Calculate the resultant of the four forces shown and their total moment about A. Hence determine the perpendicular distance from A to the line of the single force which would have the same effect as the forces F1, F2, F3 and F4 combined.
Assume the following values:
F1 = 55N, F2 = 33N, F3 =...