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Question 1: As shown in the below figure, a simply supported beam with the cross section of 2 in wide by 4 in high and 12 ft long is subjected to a concentrated load of 2000 lb. Find the maximum stress and also stress in at location of 0.5 in from the top of the beam at midspan. 2000 lb 3 ft 9 ft -3A-+- 12 ft Question 2: Determine the minimum height h of the following beam if the maximum flexural stress is 20 MPa. 2.5 kN/m 3m 80 mm R₁ R₂ Question 3: A simply supported steel beam with 15 mm wide by 30 mm high and 6 m long is shown. If the density of steel is 7850 kg/m³, find the maximum bending stress caused by the weight of the bar. w = 34.65 N/m 15 mm 6 m 1m 30 mm