3-55. Determine the required magnitude of force Fif the resultant couple moment on the frame is 200 N - m, clockwise. F02 m--0.2 m- 30 0.2 m 1500 N 1500 N 0.2m 30 0.2 m

4-122. Replace the force system acting on the pipe. assembly by a resultant force and couple moment at point O. Express the results in Cartesian vector form. = F2 (-10i+25j+20k] 1b F₁ = {-201-10j + 25k) 1b 2 ft 2 ft 2 ft- 1.5 ft

If F = 300KN, determine the resultant couple moment. -2 m 2m F 30° 2 m 250 kNA 250 kN 2 m 30° 3. 2m

find the sum of the moments of the Forces in kN.m about Point O, (positive in the counter- clockwise direction). F1 = 60 kN and F2 = 22 kN. 15 m 9 m F1 kN F2 KN