Angular velocity is a vector quantity, meaning it has both magnitude and direction. The direction of angular velocity is determined by the right-hand rule:

1. Curl your fingers in the direction of the object's rotation.

2. Your thumb will point in the direction of the angular velocity vector.

Example:

Imagine a spinning wheel rotating clockwise.

* Curl your fingers in the direction of the rotation (clockwise).

* Your thumb will point downwards, indicating that the angular velocity vector points downwards.

Key points:

* The direction of angular velocity is perpendicular to the plane of rotation.

* It's often represented by the symbol ω (omega).

* It's measured in radians per second (rad/s).

Note: The right-hand rule is a convention. You can also use the left-hand rule, but it's less common. The important thing is to be consistent with the rule you choose.