Bending Moment in Strength Of Materials : Practice MCQ Questions & Answers with Explanations

Explanation: Shear Force: Shear force at any section is the summation of all transverse loading, either to the left or to the right of any section. Bending Moment: Bending moment at any section is a resultant algebraic sum of moments caused by transverse forces either from the left or right of the section. Relationship between bending moment, shear force, and loading: The rate of change of shear force at any section is equal to load intensity at that section.

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.