Question

What is a collinear system of forces for the bodies over which this theorem is to apply?

(a) The force system having all the forces parallel to each other

(b) The force system having all the forces perpendicular to each other

(c) The force system having all the forces emerging from a single point

(d) Forces cannot form a collinear system of forces, it is not possible

I have been asked this question by my college professor while I was bunking the class.

Query is from Theorem of Pappus and Guldinus in division Centre of Gravity and Centroid of Engineering Mechanics

Answer 1

Correct answer is (c) The force system having all the forces emerging from a single point

For explanation I would say: The force system having all the forces emerging from a point is called the collinear system of force. This is a type of system of the force, which is easy in the simplification. This is because as the forces are the vector quantity, the vector math is applied and the simplification is done.