Question

The net forces of acting on the body need to be zero. This is also applicable for the simply supported beams. This means that the support reaction is also counted in making the net force zero.

(a) True

(b) False

This question was addressed to me by my school teacher while I was bunking the class.

The query is from Conditions for a Rigid-Body Equilibrium in section Equilibrium of a Rigid Body of Engineering Mechanics

Answer 1

Right choice is (a) True

The explanation is: The support reactions of the beam is also counted in the making of the forces zero. As far as the net force is concerned the support reaction does affect the conditions for the equilibrium of the body. Hence one needs to take care of the support reactions of the beam too.