Rougher surfaces have ______friction between them than smoother surfaces

Options

A. more
B. less
C. equal
D. no

Answer

**Step-by-Step Solution:**

1. **Understanding Friction**: Friction is the force that opposes the relative motion of two surfaces in contact. It is influenced by the nature of the surfaces involved.

2. **Identifying Surface Types**: Rough surfaces (like concrete or sand) have irregularities and protrusions that interlock with each other, leading to higher friction. In contrast, smoother surfaces (like ice or wet tiles) have fewer irregularities, allowing for easier sliding.

3. **Comparing Friction Levels**: When comparing rough surfaces to smooth surfaces, it is important to note that the rougher the surface, the more resistance there is to motion. This means that rough surfaces will have a higher coefficient of friction.

4. **Conclusion**: Based on the understanding that rough surfaces create more interlocking and resistance compared to smooth surfaces, we conclude that rougher surfaces have **more friction** between them than smoother surfaces.

5. **Final Answer**: Therefore, the correct answer to the question is: Rougher surfaces have **more** friction between them than smoother surfaces.

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