What is the shear force with a constant bending moment?

In structural engineering, shear force is a measure of how much of a force is acting parallel to a cross-section of a beam or structural element. The concept of shear force is closely related to bending moments, which represent the internal moments that develop in response to external loads.

When a bending moment is constant along a section of a beam, it implies that the internal stresses and the distributions of forces do not change over that segment. Because of this constant moment, there is no net change in the bending effect in that specific segment, which leads to a situation where the shear force becomes zero. This is due to the fact that shear force is derived from the changes in the bending moment. Thus, if the bending moment does not change, it follows that the shear forces acting at that point must be balanced and equal to zero.

Therefore, the correct understanding of shear force in relation to a constant bending moment leads directly to the conclusion that the shear force is indeed equal to zero in such scenarios.