Question

Just like the collinear forces for free body diagrams there are collinear couple and the net moment is taken out from it.

(a) The first part of the statement is false and other part is true

(b) The first part of the statement is false and other part is false too

(c) The first part of the statement is true and other part is false

(d) The first part of the statement is true and other part is true too

I have been asked this question in class test.

My enquiry is from Different Free Body Diagrams topic in division Equilibrium of a Rigid Body of Engineering Mechanics

Answer 1

The correct answer is (c) The first part of the statement is true and other part is false

To elaborate: Both of them are vector quantities. And both of them can be easily simplified. If taken in the vector form then the task is even easier. Thus it is not necessary for the force or the couple to be vector only, even if the magnitude is taken, the simplification is done in the 2D.