Why sledges are not provided with wheels?

Explanation

### Step-by-Step Solution:

1. **Understanding the Function of a Sledge**:
- Sledges are designed to move over snow and ice. They are typically flat-bottomed and are meant to glide smoothly over these surfaces.

2. **Analyzing the Problem with Wheels**:
- If sledges were equipped with wheels, the wheels would need to make contact with the surface to function properly.

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