Question

The bending moment diagram represents

• A. The cumulative effect of external loads as a function of position along the element
• B. The direct measure of material strength
• C. The displacement of a beam under load
• D. The shear force distribution along the beam

Hint:

Shear and Moment Diagrams. Shear Force Diagram (SFD): Plots internal shear force vs position. Bending Moment Diagram (BMD): Plots internal bending moment vs position. Both represent internal effects resulting from external loads. \(dM/dx = V\).

Answer 1

The Correct Option is A

In structural analysis, particularly for beams, the bending moment at any cross-section is the algebraic sum of the moments caused by all external forces (loads and reactions) acting on one side of that section.
The bending moment diagram (BMD) is a graph that plots the value of this internal bending moment as a function of position along the length of the structural element (e.
g.
, beam).
It visually represents how the internal bending moment, which arises as a cumulative effect of the external loads and reactions, varies along the member.
Material strength is a material property.
Displacement relates to deflection.
Shear force distribution is shown by the Shear Force Diagram (SFD).