Question

If F = F1+F2, then the moment of this force F about a point at a distance r is M=rxF1 + rxF2.

(a) True

(b) False

This question was posed to me by my college director while I was bunking the class.

This key question is from Moment of a Force in section Force System Resultants of Engineering Mechanics

Answer 1

Correct option is (a) True

Explanation: If F = F1+F2, then the moment of this force F about a point at a distance r is M=rxF1 + rxF2.

As M = rx(F) = rx(F1 + F2) = rxF1 + rxF2. This is known as the principle of moments. As the force is a vector quantity thus this is the distributive property which we apply to get the answer.