Question

If a particle is rotating in circular path, the direction of the angular velocity is along

• A. the tangent of the circular path
• B. towards centre
• C. away from centre
• D. the axis of rotation

Answer 1

The correct option is D the axis of rotation


$\overrightarrow{v}=\overrightarrow{\omega }\times \overrightarrow{r}$

for a particle in circular motion $\overrightarrow{v}$ is along tangent, $\overrightarrow{r}$ is away from centre.

so $\overrightarrow{\omega }$ should be along axis of rotation.


(OR)


Using the right hand rule, the direction of angular velocity is defined as the direction in which the thumb of your right hand points when you curl your fingers in the direction of rotation.