Question

write an mathematical expression for the moment of force

Answer 1

Not to be confused with Momentum.

For the mathematical concept, see Moment (mathematics). For the moment of a force, sometimes shortened to "moment", see Torque.

In physics, a moment is an expression involving the product of a distance and physical quantity, and in this way it accounts for how the physical quantity is located or arranged.

Moments are usually defined with respect to a fixed reference point; they deal with physical quantities as measured at some distance from that reference point. For example, the moment of force acting on an object, often called torque, is the product of the force and the distance from a reference point. In principle, any physical quantity can be multiplied by distance to produce a moment; commonly used quantities include forces, masses, and electric charge distributions.

Answer 2

Moment of force = Magnitude of force * Perpendicular distance of it from the pivoted point.