On the force table, position one pulley at 110 and hang a total (hanger plus mass) mass of 80 g on it. This is F. Position another pulley at 230 and hang a total (hanger plus mass) mass of 150 g on it. This is Fz. For the third pulley, position it at the appropriate angle with the appropriate mass according to what you calculated in question 3. Check to see if the center ring is exactly centered. If it's not, add/remove some mass and/or move the pulley around slightly. Do it until the ring is exactly centered. Record your measured (experimental) F3 (magnitude and angle). Does your measured result agree with your calculation? If not, what causes the difference?