Question

The equation of change in moment equals the area under the shear diagram is not applied when_________

(a) Rotational moment

(b) Bending moment

(c) Total weight

(d) Couple moment acts

I got this question by my college director while I was bunking the class.

Question is taken from Relation Between Distributed Load, Shear and Moment in portion Internal Forces of Engineering Mechanics

Answer 1

Correct choice is (d) Couple moment acts

To elaborate: As this is done with the help of distributed load method thus when a couple moment this equation act is not valid. This is done on the very small part of the beam. That is the minimal section of the beam is to be considered and then the application of the equilibrium equations are done so as to calculate the final result.