1. Column Loads Determine the resultant internal normal forces and stresses acting on the cross section at Point A in each column in the following scenarios: (a) Segment BC weighs 200 lb/ft and segment CD weights 450 lb/ft. The cross-sectional area at Point A is A = 82 in (b) The column has a mass of 160 kg/m. The cross-sectional area at Point A is A = 85,000 mm 5 kip 18 KN B 200 mm 20) mm 6 KN JORN 3 m 10 ft 8 in. 8 in. 200 mm 200 mm 3 kip 13 3kip 45 kN 45 KN KN C 4 ft 4 ft A D (a) (b)