4 m B 4m 8 0.4 m AB X-Section 0.2 mIO (a) Determine us that results in the gap (d) being closed. (b) If = 628 kN/m, determine the internal force in member BC? BC X-Section For the bar shown above, a uniformly distributed axial load wo (force per unit length) is applied between A and B. The diameter of the cross sections AB and BC are also indicated. The material properties of the bar are: E 20 GPa and 0.3. If the gap 81 mm, then answer the following questions (you can take a 3.14):

A 13-mm-diameter steel (E = 193 GPa) rod (2) is connected to a 27-mm-wide by 10-mm-thick rectangular aluminum (E = 72 GPa) bar (1), as shown. Assume L1 = 0.74 m and L2 = 1.38 m. Determine the force P (in kN rounded to the nearest tenths) required to stretch the assembly 8.1 mm.

a) Determine the tensile force T’ in the rope on the side connected to joint B: b) Determine the internal compressive normal force ƒBC in the tube BC: c) Determine the horizontal reaction force Rx and the vertical reaction force Ry in joint A: d) Determine the moment M of the center of bar AB: e) Determine the compressive stress σBC in the tube BC: f) Determine the critical load Pc for the tube BC: g) Which of the following statements about the tube BC is correct: A. The tube BC fails due to yielding B. The tube BC fails due to buckling C. The tube BC fails due to both yielding and buckling D. The tube BC is safe against both yielding and buckling h) Pin C has a diameter of 30 mm; calculate the shear stress τ of the pin C, when considering one cross-section for shear stress calculation:

1. The steel shaft carries the axial loads as shown in the figure below. Determine the change in overall length of the shaft caused by these loads given that P = 3100 Ib. The cross-sectional area for each segment is shown in the figure. Use E = 29 X 10° psi for steel. %3D A = 0.75 in.² ЗР A = 1.0 in.² A = 0.5 in.? 2P -P 4P e-3 ft- - 5 ft 4 ft→