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The difference between the two and the three force members is:

(a) The former is collinear and the latter is parallel

(b) The former is parallel and the latter is perpendicular

(c) The former is perpendicular and the latter is collinear

(d) The former is acting on two points in the body while the latter is on three points

I got this question by my school principal while I was bunking the class.

The above asked question is from Two and Three Force Members in division Equilibrium of a Rigid Body of Engineering Mechanics

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The correct option is (d) The former is acting on two points in the body while the latter is on three points

Easy explanation: The definition of the two force member only defines that the forces are being acted on the two points on the body. So does is the definition of the three forces members. The points of action of the three forces are three.

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