Question

If a particle is moving clockwise in a circle in $x-y$ plane with centre at origin, the direction of angular velocity of the particle is

• A. $\hat{i}$
• B. $\hat{k}$
• C. $-\hat{j}$
• D. $-\hat{k}$

Answer 1

The correct option is D $-\hat{k}$

Angular velocity is always directed perpendicular to the plane of the circular path.
Since, the plane here is $x-y$ plane and sense of rotation is clockwise, from the "Right Hand" rule, the direction of angular velocity will be $-\hat{k}$.