The bar has a cross-sectional area of 320(10-6) m. It is subjected to a uniform axial...

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The bar has a cross-sectional area of 320(10-6) m. It is subjected to a uniform axial distributed loading along its length and to two concentrated loads, as shown. Part A w=8 kN/m -6 kN 3 kN 0.75 m 0.5 m Determine the average normal stress in the bar as a function of a for 0 m < x <0.5 m. Express your answer as an expression in terms of the variable and any necessary constants, use three significant figures. (x) = MPa The bar has a cross-sectional area of 320(10-6) m. It is subjected to a uniform axial distributed loading along its length and to two concentrated loads, as shown. Part A w=8 kN/m -6 kN 3 kN 0.75 m 0.5 m Determine the average normal stress in the bar as a function of a for 0 m < x <0.5 m. Express your answer as an expression in terms of the variable and any necessary constants, use three significant figures. (x) = MPa