Question 3 (25 Marks) The beam in Figure 3 is 6 m long and supports a point load of 5 kN and a uniformly distributed load of 6 kN/m as shown. (a). Calculate the support reactions. (b). Draw to scale, on graph paper, the shear force diagram." (10%) (25%) (c). Draw to scale, on graph paper, the bending moment diagram. ( (25%) (d). Over what length of the beam are the bending stresses compressive on the top surface of the beam? (10%) (e). Calculate the magnitude and location of the maximum tensile, compressive and shear stresses in this case if a rectangular cross section, whose dimensions are 120mm x 300mm, orientated so that it is bending about its major axis of bending, is used for the beam. (30%) Note: Shear force and bending moment diagrams should be properly labelled with units (on both axes). Maximum values should be indicated. SKN r Im 3m 6kN/m Figure 3 Boo 120 2m