What is periodic motion ?

Answer

### Step-by-Step Solution:

1. **Definition of Periodic Motion**:
- Periodic motion is defined as a type of motion that repeats itself after a fixed interval of time.

2. **Time Period**:
- The fixed interval of time after which the motion repeats is known as the time period. It is a crucial aspect of periodic motion.

3. **Examples of Periodic Motion**:
- To illustrate periodic motion, consider a daily routine. For instance, if you leave your home for work at a specific time every morning and return home at a specific time in the evening, this routine exemplifies periodic motion. The time taken for each complete cycle (from home to office and back) represents the time period of this motion.

4. **Characteristics of Periodic Motion**:
- In periodic motion, the object returns to its initial position after each time period, and the motion can be uniform or non-uniform.

5. **Conclusion**:
- Therefore, periodic motion is characterized by its repetitive nature and the consistent time interval (time period) between each repetition.