**What is Angular Displacement? Is it a vector or scalar quantity? What are three conditions for Angular Displacement?**
It is the angle described by a particle from one point to another, with respect to time. Since the angular displacement has both magnitude and direction, therefore it is a vector quantity.

In order to completely represent an angular displacement by a vector, it must fix the following three conditions:

- Direction of the axis of rotation,
- Magnitude of angular displacement, and
- Sense of the angular displacement.

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