Question

"The moment of resultant of all the forces in a plane about any point is equal to the algebraic sum of moment of all the forces about the same point". This statement is known as

• A. Parallelogram law
• B. Triangle law
• C. Lami's theorem
• D. Varignon's theorem

Hint:

Varignon’s Theorem is especially useful when calculating moments in statics, allowing simplification of distributed force systems.

Answer 1

The Correct Option is D

Step 1: Understand the principle stated in the question.
The moment of a force about a point gives a measure of its rotational tendency. When multiple forces act on a body, their combined (resultant) moment about a point is the sum of their individual moments. Step 2: Identify the theorem.
The principle described matches Varignon’s Theorem, which states: “The moment of the resultant force about a point is equal to the sum of the moments of the component forces about the same point.” Hence, the correct answer is Varignon’s Theorem.