Question

The loading generally act upon the ___________ of the body.

(a) Centroid

(b) Symmetrical centre

(c) Rotational centre

(d) Chiral centre

I have been asked this question in an internship interview.

The above asked question is from Internal Forces Developed in Structural Members topic in chapter Internal Forces of Engineering Mechanics

Answer 1

Right option is (a) Centroid

The best I can explain: The loads generally are applied on the centroid of the body. The moment of the body is also calculated along the centroid axis, thus the forces which are acting externally are always acting upon the centroid of the body. Gravity too is acted upon the centroid of the body.