Question

∑Fx=0, ∑Fy=0 and ∑Fz=0 are vector equations for the three dimensions. They are satisfied when the body is achieved its state of equilibrium.

(a) True

(b) False

I got this question during a job interview.

My question is from Equilibrium in Three Dimensions topic in division Equilibrium of a Rigid Body of Engineering Mechanics

Answer 1

The correct option is (b) False

For explanation I would say: The answer is false as the equations asked are scalars. As we make the net sum of the forces along the axis equal to zero. Of course this equation comes from the solving the vector forms, but still the result is a scalar, hence the equations are scalar.