# What is torque?

Jun 5, 2016

Torque is the rotational analogue of force. It is the equivalent of force which makes a body rotate about some axis.

#### Explanation:

As you may see, it's the equivalent of force which makes the nut rotate about it's axis.

Mathematically, Torque, $\tau = r \cdot F \cdot S \in \theta$, where $r$ is the length of the rotating arm, $F$ is the force and $\theta$ is the angle between the two.

Torque is a vector, i.e. it has a direction associated with it. It is the cross product of vectors $\vec{r}$ and $\vec{F}$.

Image : hyperphysics.phy-astr.gsu.edu