# Definition:Rotational Motion

## Definition

Let $B$ be a body which is in motion.

Let the velocities of the individual particles of $B$ be defined by a vector field $\mathbf V$ over $B$.

Let the curl of $\mathbf V$ be non-zero.

Then the motion of $B$ is described as being rotational.

## Also known as

In the context of fluid mechanics, rotational motion is often seen referred to as vortical motion.