R17-9. The wide-flange A992 steel column has the cross section shown. If it is fixed at the bottom and free at the top, determine the maximum force P that can be applied at A without causing it to buckle or yield. Use a factor of safety of 3 with respect to buckling and yielding. -20 mm 150 mm, 10 mm 패-10 mm 100 mm 100 4 m 100 mm 10 mm

16. In a cantilever subjected to a concentrated load (P) at the free end and having length =1, Maximum bending moment is a. Pl at the free end b. Pl at the fixed end C. PI/2 at the fixed end d. Pl at the free end 17. An axle is subjected to loads as shown حداد Maximum bending moment is а. WI b. W(l-a) C. Wa d. W(I+a) 18. At a point in a simply supported or overhanging beam where Shear force changes sign and = 0, Bending moment is а. Маximum b. Zero c. Either increasing or decreasing d. Infinity 19. In a cantilever subjected to a combination of concentrated load, uniformly distributed load and uniformly varying load, Maximum bending moment is a. Where shear force=0 b. At the free end C. At the fixed end d. At the mid-point 20. Point of contra-flexure is a a. Point where Shear force is maximum b. Point where Bending moment is maximum c. Point where Bending moment is zero d. Point where Bending moment30 but also changes sign from positive to negative