Question

In the simplification of the forces for the free body diagram, the net force acts at the ___________ of the loading body.

(a) Centroid

(b) The centre axis

(c) The corner

(d) The base

The question was posed to me in semester exam.

The origin of the question is Problems Involving Dry Friction topic in chapter Friction of Engineering Mechanics

Answer 1

Right option is (a) Centroid

To explain: In the simplification of the loading system the net force acts at the centroid of the loading body. That is if the loading system is in the form of the triangle then the at the distance 2 by 3 of the base the net force of the loading will act. And the load will be half the area of the loading.