Give one example of forced vibration.

Explanation

**Step-by-Step Solution:**

1. **Understand the Concept of Forced Vibration**:
- Forced vibration occurs when an object is made to vibrate by an external force. This means that the vibration is not due to the object's natural frequency but rather due to an influence from outside.

2. **Identify an Example**:
- A common example of forced vibration is when a guitar string is plucked.

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