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Explain that angular velocity is a vecto...

Explain that angular velocity is a vector and its direction is given by right hand screw rule.

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Angular velocity is a vector, its direction is known by the right hand screw rule.

When the head of a right handed screw rotates with the body, the screw advances in the direction will be the direction of angular velocity.
The angular velocity of a body rotating about a fixed axis is parallel to the axis. It is shown in about figure.
If a rigid body rotating in clockwise direction, then its angular velocity is negative and if rotating in anti-clockwise direction its angular velocity is positive.
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