12 lb -1.0 ft 12 ´26 lb -0.75 ft x´ 32 lb • ft B -2 ft-- D - 3 ft- 8 lb 1.5ft 32 lb

2. Show complete STEP BY STEP solution, and provide FBD.

4-2) Find the megnitude and direction of the support forcas at A and B and the res tant mament

3-18. The tongs are used to grip the ends of the drilling pipe P.Determine the torque (moment) Mpthat the applied force F=750 N exerts on the pipe about point Pas a function of 8. Plot this moment Mp versus 0 for 0 s0 = 90°. 150 mm Mp 1075 mm

Q4/ In picking up a load from position B, a cable tension T of magnitude 24 kN is developed. Calculate the moment which T produces about the base O of the 4 of 5 construction crane. 18 m T 30 m B. 5 m 6 m Ans. Mo = - 302i + 139.4; - 83.6k N.m

The needle-nose pliers are used to either cut objects at location A or grip objects at location B. Compute (a) the cutting force at A and (b) the gripping force at B in terms of the applied force F. Determine the magnitude of the pin reaction at O in both cases. Neglect the effects of the slight opening of the jaws to accommodate the gripped items. B Answers: 66 mm 14 mm A O (a) The cutting force at A: 103 mm FA i (b) The gripping force at B: FB = i F F F The pin reaction at O: Fo- i F The pin reaction at O: Foi F F

2-43. Determine, and show on a sketch of the co- ordinate system, the resultant of each of the parallel, noncoplanar force systems that satisfies the following conditions: (a) Σ F, = 40 lb ↑ , Σ M. = 100 ft-lb and Σ M₁ = 160 ft-lb; (b) Σ F, = 50 lb ↓, Σ M₁ = 150 ft-lb and ; Σ Μ. = 90 ft-lb di (c) Σ F, = 20 1b \ , Σ M, = 60 1-10 λ s. Σ Μ, = 40 ft-b and

Determine the couple-vector that is equivalent to thethree couples acting on the gear box, given that C1 = 200 lb.in, C2 = 140 lb.in, C3= 220 lb.in

Show the solution.

The moment of the 90 N force about point O for the condition theta = 15 degrees is equal to. F = 90 N 800 mm A 600 mm Select one: O a. -55.6 N.m O b. 70.8 N.m O c. 33.5 N.m O d. -83.5 N.m