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Problem 3 (for all students). The bar is made of A-36. It has a constant width of 35 mm and a thickness of 10 mm. If LaB = 150 mm,

LBC = 120 mm and LcD = 110 mm, Determine the average normal stress in each section of the bar and total length changes of the bar (SA/D).

Fig: 1

Fig: 2