Explanation: Bending moment Diagram: Bending moment diagrams are simply plots of the bending moment (on the y-axis) versus the position of various points along the beam (on the x-axis). For UDL(Uniformly Distributed Load) Relationship between Shear force, Bending moment and Loading rate $-(\frac {ds}{dx}) =w$ i.e. negative slope of Shear force diagram at any section will be equal to the load intensity at that section $\frac {dM}{dx} = ~S$ i.e.