Question

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

(a) True

(b) False

The question was asked in homework.

My doubt is from Work in division Principle of Virtual Work of Engineering Mechanics

Answer 1

The correct choice is (b) False

The explanation is: 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.