Question

The SI unit of moment of force is ____________

• A. N/m
• B. N m
• C. N m²
• D. N/m²

Answer 1

The correct option is B

N m

The explanation for the correct answer Option B:

1. The moment of force is called torque.
2. It is mathematically given by, moment of force = Force * force arm( perpendicular distance from the axis of rotation).
3. The SI unit of Force is newton or N and the SI unit of force arm or perpendicular distance is meter or m
4. Therefore, the SI unit of moment of force is N m

The explanation for the incorrect answer Option A:

1. $\frac{N}{m}$can be a unit of a physical quantity representing Force per unit length.

The explanation for the incorrect answer Option C:

1. N m² can be a unit of a physical quantity representing force multiplied by area.

The explanation for the incorrect answer Option D:

1. $\frac{N}{m^2}$is a unit of pressure equal to force per unit area.

Hence Option B is the correct answer.