Choose the correct option for each question. There is only correct response for each question.
Friction depends on the _____of surfaces

Options

A. nature
B. mass
C. direction
D. force

Answer

To solve the question "Friction depends on the _____ of surfaces," we need to analyze the options provided and understand the factors that affect friction.

### Step-by-Step Solution:

1. **Understanding Friction**:
- Friction is a force that opposes the motion of an object when it comes into contact with another surface. It is classified as a contact force, meaning it only acts when two surfaces are in contact.

2. **Identifying the Options**:
- The options provided are:
- A) Nature of the surface
- B) Mass of the surface
- C) Direction of the surface
- D) Four surfaces

3. **Analyzing Each Option**:
- **A) Nature of the surface**: This refers to the texture and material properties of the surfaces in contact (e.g., rough, smooth, wet, dry). The nature of the surface significantly affects the amount of friction generated.
- **B) Mass of the surface**: While the mass of an object can affect the normal force (and thus the frictional force), it does not directly determine the friction itself.
- **C) Direction of the surface**: The direction does not influence the frictional force; friction acts opposite to the direction of motion.
- **D) Four surfaces**: This option does not make sense in the context of the question.

4. **Conclusion**:
- The correct answer is **A) Nature of the surface**. Friction depends primarily on the nature of the surfaces in contact, such as their roughness or smoothness.

### Final Answer:
Friction depends on the **nature of the surface**.

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