Problem: 3 A Y 120 lb 18 ft 6 ft 6 ft 6 ft 8 ft 8 ft 1 120 lb B Determine the magnitude and direction of the couple moment. a. 2,270 lb-ft (clockwise) b. 2,550 lb-ft (clockwise) c. 2,,500 lb-ft (counter-clockwise) d. 2,350 lb-ft (counter-clockwise) e. 3,050 lb-ft (clockwise) Problem: 4 Z 20 cm 20 cm y 20 cm, 20 cm, 20 cm 90 N 80 N 140 N 110 N A plate has four point loads on its top surface. Where is the equivalent single force located in the x-z plane? a. x = 2.5 cm, z = 40 cm b. x 10 cm, z = 50 cm c. x 2.5 cm, z = 50 cm d. x 10 cm, z = 40 cm e. x 5 cm, z = 45 cm