Two blocks A and B, each having a mass of 6 kg, areconnected by the linkage shown. If the coefficient of static friction at the contacting surfaces is μs = 0.5, determine the largest vertical force P that can be applied to pin C without causing the blocks to move. Neglect the weight of the links. C 30° A P 30° Figure 4 B Hint: As there is a hinge (pin) at point C, the moment at this point is zero. Members AC and BC can be taken as truss members with only axial force.

a. What are the external reaction at the position of the rocker at D, the external horizontal, vertical and resultant reactions at point A? [Solve for a value in kips, with right as positive and left as negative.] b. What is the force in member BC? c. What is the minimum possible diameter of the pin at A which is double shear and the minimum possible diameter of pin B which is single shear? [in inches]

9-3. Determine the reactions at the supports, then draw the moment diagram. The moment of inertia for each segment is shown in the figure. Assume A and C are rollers and B is a pin. Take E = 200 GPa. 6. B. 40 kN 20 kN 20 kN IAB = 120(10°) mmLD IBC = 90(10°) mm %3D -3 m 3 m -3 m- -4 m- 4 m- iq s zi 8 omua2A 2noiloco högqua on nimmote Jns Prob. 9-3olloT o bms A brs

The solid 32 mm diameter steel [E = 200 GPa] shaft supports two belt pulleys. Assume that the bearing at B can be idealized as a roller support and that the bearing at D can be idealized as a pin support. For the loading shown, determine: (a) the shaft deflection at pulley A. (b) the shaft deflection at pulley C. Assume P = 500 N, Q = 1000 N, LAB = 600 mm, LBC = 800 mm, LCD = 800 mm.