Problem No. 5: The beam shown below has a cross-sectional area in the shape of a channel a) Determine the centroid of the section. b) Determine the moment of inertia of the section about the neutral axis. c) Determine the maximum bending stresses that can occur at the top and the bottom of the cross-section at section a-a. 2.4295 kN S150 mm 200m 15 min- 15mm a) Centroid of the section (x bar, y bar) => x bar 15+125 = 140 mm 2A 2|0.100 m|(0.200 m)(0.015 m) (0.010 m](0.02 m)(0.250 m) Z(0.200 m)(0.015 m) 0.020 m(0.250 m) -0.05909 m 59.09 mm The momentof inertia abont the neutral axis is determined using the parallel-axis

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