Question

The system of the collinear and the parallel force in free body diagrams are simplified as _________

(a) The simplified collinear force system gives us a net force and the parallel force system gives us a simplified force, and then we add it vectorially

(b) Such simplification is not possible

(c) The simplification is usually done by not considering the directions of the both

(d) The simplification is done by considering the rotations only

I had been asked this question in exam.

Enquiry is from Different Free Body Diagrams topic in chapter Equilibrium of a Rigid Body of Engineering Mechanics

Answer 1

Right answer is (a) The simplified collinear force system gives us a net force and the parallel force system gives us a simplified force, and then we add it vectorially

For explanation: The simplification is easy. The simplified force system gives us a net force and the parallel force system gives us a simplified force, and then we add it vectorially. Thus the vector addition at the last can be easily done and thus both can be simplified.