Question 2181 Deck Safety

The correct answer is D) lever arm. A moment is obtained by multiplying a force by its lever arm, which is the perpendicular distance from the axis of rotation to the line of action of the force. This relationship is expressed in the formula for calculating moment: M = F x d, where M is the moment, F is the force, and d is the lever arm. The other answer choices are incorrect because: A) Moment of inertia is a measure of an object's resistance to angular acceleration, not the calculation of moment. B) The point of application is the location where the force is applied, not the lever arm. C) A couple is a pair of equal and opposite forces that create a moment, but it is not the same as the lever arm.