Question

Which of the following is correct?

(a) The application of the conditions of the equilibrium of the body is valid only if the forces are collinear

(b) The application of the conditions of the equilibrium of the body is valid only if the forces are parallel

(c) The application of the conditions of the equilibrium of the body is valid only if the forces are perpendicular

(d) The application of the conditions of the equilibrium of the body is valid throughout

The question was posed to me during a job interview.

Question is taken from Conditions for a Rigid-Body Equilibrium topic in section Equilibrium of a Rigid Body of Engineering Mechanics

Answer 1

Right option is (d) The application of the conditions of the equilibrium of the body is valid throughout

Explanation: The application of the conditions of the equilibrium of the body is valid throughout. This means that the conditions are irrespective of the types of forces. The conditions are the basic rules that defines the equilibrium of the body and thus are applicable in any type of forces of the real axis.