Question

What is the rotational analog of force? And its S.I unit.

Answer 1

1. Rotational analog of force is also known as Torque. Torque is characterized as the cross product of such force vector $F$ that eventually causes rotational motion and its perpendicular distance $r$ from the axis of rotation also known as load arm.
2. Torque is denoted by the symbol tau “$\mathrm{\tau }$” and $\tau =r\times F$
3. The S.I unit for torque is $\mathrm{Newton}\mathrm{metre},\mathrm{Nm}({\mathrm{m}}^2\mathrm{kg}{\mathrm{s}}^{-2})$.

Therefore, torque is the rotational analog of force.