If Mz = 715 kip-ft, find the magnitude of the bending stress at a point H.    For the beam cross section, assume a = 10 in. b = 14 in. d = 39 in. r = 5 in.   The centroid of the cross section is located 17.9 in. below the uppermost surface of the beam.  The moment of inertia about the z axis is 60436 in.4.

Dont forget to draw the FREE BODY DIAGRAMS ALSO PLEASE! (:

Question 3 a. b. Calculate the second moment area of the section shown about an axis Y - Y through the centroid. 100 2.23. 120 mm 20 mm 20mm X ➜ [20mm Calculate the radius of curvature of the neutral axis when a bending moment of 25 KNm is acting on the section. E= 206 GPa

The cross-sectional dimensions of a beam are shown in the figure. Assume a = 45 mm, b = 75 mm, t = 4 mm and d =55 mm. (a) If the bending stress at point Kis 54 MPa (C), determine the internal bending moment M₂ acting about the z centroidal axis of the beam. (b) Determine the bending stress at point H. The bending stress is positive if in tension and negative if in compression. IT H Answers: (a) M₂= (b) og = i 945.9 144.881 d N-m MPa