Question

What is the SI unit of moment of force?

Answer 1

Step 1: Moment of force

1. The moment of force is the measure of the tendency of a force to rotate a body about a particular axis.
2. The moment of force is equal to the product of force and the perpendicular distance of the line of action of a force from the axis of rotation.
3. The moment of force is known as torque and is denoted by $(\tau )$.

4. Mathematically, it can be expressed as, $\tau =d\times F$, where $d$ is the perpendicular distance of the line of action of a force from the axis of rotation, and, $F$ is applied force.

An illustrative diagram of the moment force is shown below.

Step 2: SI unit of moment of force

1. Newton-meter $\left(\mathrm{N}‐\mathrm{m}\right)$ is the SI unit of moment of force.
2. $[\mathrm{M}{\mathrm{L}}^2{\mathrm{T}}^{-2}]$ is the dimensional formula for the moment of force.
3. It is a vector quantity.