When can say that circular motion is periodic ?

Explanation

### Step-by-Step Solution:

1. **Understanding Circular Motion**: Circular motion refers to the movement of an object along the circumference of a circle. The object moves in a fixed path (the circular orbit) and can be described in terms of angular displacement.

2. **Definition of Periodic Motion**: A motion is said to be periodic if it repeats itself after a fixed interval of time. This means that the object returns to its initial position after a certain time period.

3. **Identifying Fixed Time Intervals**: In circular motion, if an object completes one full revolution around the circular path in a fixed time interval, we can say that the motion is periodic. For example, if an object takes time \( T \) to complete one full circle, then it will return to its starting point after every \( T \) seconds.

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