Question

The moment axis, force and the perpendicular distance in the bending moment diagram is lying in____________

(a) Two planes perpendicular to each other

(b) A single plane in the direction of the force

(c) A single plane in the direction of the perpendicular distance

(d) A single line in the direction of the force

I have been asked this question by my school teacher while I was bunking the class.

My query is from Bending Moment Diagram in chapter Internal Forces of Engineering Mechanics

Answer 1

Right answer is (a) Two planes perpendicular to each other

Easy explanation: The moment axis, force and the perpendicular distance is lying in the three dimensional Cartesian. It doesn’t lye on the single plane. It also doesn’t lye in a single line. Nor in the direction of the force. Thus they all lye in the planes which are perpendicular to each other.