a (400-2a) Figure 1.48 Problem 4 4 m T a A 15 mm- D |-- P-17 kN A round steel bar of a length of 400mm and a diameter of 15mm at the middle portion is subjected to an axial tensile force of 17kN. What should be the diameter at the outer collars if the stress in the collar is not to exceed 40MPa? What is the magnitude of 'a' if the total extension in the bar is not to exceed 0.17mm? E 200GPa (Fig. 1.48). 200 mm 5 m A 2,500-N load is suspended at a bar attached to ropes of a cross- sectional area of 40mm2 and lengths of 4 and 5m, respectively, as shown in Fig. 1.49. The load is suspended in such a manner that the bar AB remains horizontal. W-2500 N Figure 1.49 B T