Question

The rotational analogue of force is :

Answer 1

Rational analogue: It is a force in a linear motion is torque.

Formula to calculate rational analogue:

$\overrightarrow{\tau }=\overrightarrow{r}\times \overrightarrow{F}$

where $\tau$ is the torque, $r$ is the radius of the rotatory motion, and $F$ is the force applied.

1. Force is necessary for a body to do translational motion.
2. Similarly, it is torque that is required to rotate a body.
3. If net torque applied to the body about the axis of rotation is zero, then the body does not rotate.

Hence, the rotational analogue of force is torque.