3-41. The board is used to hold the end of the cross lug wrench in the position shown when the man applies a force of F = 100 N.Determine the magnitude of the moment produced by this force about the x axis Force Flies in a vertical plane. 60° 250 mm 250 mm

4-7. If the moment produced by the 4-kN force about point A is 10 kN-mclockwise, determine the angle d.where 1,06 > > .0 045 m

2/37 A man usen a crowbar to lift the corner of a hot tub for maintenance purposes. Determine the moment made by the 350-N force about point O. Neglect the small thickness of the crowbar. 350 N 15 20 650 mm Problem 2/37

In steadily turning the water pump, a person exerts the 120-N force on the handle as shown. Determine the moment of this force about point O. Ans. Mo = 14.74 N m CW %3D

2/33 A prybar is used to remove a nail as shown. De- termine the moment of the 240-N force about the point O of contact between the prybar and the small support block. P-30 N 16 m 240 N 16 m 15 350 mm PROBLEM 2/3s 2/36 A man exerts a force F on the handle of the stationary wheelbarrow at A. The weight of the wheelbarrow along with its load of dirt is 185 Ib with center of gravity at G. For the configuration shown, what force F must the man apply at A to make the net moment about the tire contact point B equal to zero? 65 30 mm PROBLEM 2/33 Representative Problems 2/34 An overhead view of a door is shown. If the com- 20 pressive force F acting in the coupler arm of the hy- draulic door closer is 17 lb with the orientation shown, determine the moment of this force about the hinge axin O. 20 PROBLEM 2/36 2/37 A 150-N pull T in applied to a cord, which is wound securely around the inner hub of the drum. Determine the moment of T about the drum center C. At what angle e should T be applied…

3-11. The wheelbarrow and its contents have a mass of 50 kg and a center of mass at G. If the resultant moment produced by force F and the weight about point A is to be zero, determine the required magnitude of force F. 30° 0.65 m 0.5 m -1.2 m '0.3 m

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

3-85. The belt passing over the pulley is subjected to forces F, and F, each having a magnitude of 40 N. F, acts in the -k direction. Replace these forces by an equivalent force and couple moment at point A. Express the result in Cartesian vector form. Set 8 - 0 so that F acts in the -j direction. = 80 mm 300 mm

The caster wheel is subjected to the two couples. Determine the forces F that the bearings exert on the shaft so that the resultant couple moment on the caster is zero.

3-8. *3-8. The foot segment is subjected to the pull of the two plantarflexor muscles. Determine the moment of each force about the point of contact A on the ground. 100 mm F₁ = 100 N 30% 25 mm- F₂ = 150 N 70° 87.5 mm Prob. 3-8