Consider a beam supporting two concentrated loads and a distributed load. Draw the shear and bending moment diagram for the beam. First, draw a free-body diagram of the beam and, using the equilibrium equation, the reaction forces are obtained. Next, divide the beam into different sections and draw the free-body diagram of each section. Applying the equation of equilibrium for the sections, the shear for individual sections can be determined. Shear remains constant between concentrated loads and reaction forces while it varies linearly with a constant slope in the distributed load section. The area under the shear curve between two points equals the change in bending moment between the same two points. Considering the bending moment zero at the beam's end and recalling the relation between the change in bending moment and area under the shear curve, the bending moment at each point is calculated. The bending moment diagram is drawn by connecting the known points with straight lines for regions with constant shear and a parabolic line for regions with linear shear.