Question 2: (20 out of 100) 400 Figure 1 The 500-kg engine is suspended from the jib crane at the position shown. Determine the normal stress and shear stress at points A and B on the cross section of the boom at section a-a. 50 mm 20 mm T 2 m- a 307 150 mm 300 mm 20 mm-- 0.4 m Figure 2 叶 20 mm Section a-a