(Answer the following questions briefly and to the point :)
A bullet fired vertically upward falls at the same place after some time. What is the displacement of the bullet?

Explanation

To solve the problem, we need to analyze the motion of the bullet fired vertically upward and its displacement.

### Step-by-Step Solution:

1. **Understanding the Motion**:
- When a bullet is fired vertically upward, it travels upward until it reaches its highest point, where its velocity becomes zero before it starts falling back down.

2. **Identifying Initial and Final Positions**:
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