Choose the correct option for each question. There is only correct response for each question.
Which one of these characteristics does a smooth surface has?

Options

A. Less frictional force
B. More frictional force
C. Sometimes less and sometimes more force
D. All of above

Answer

To determine the correct option regarding the characteristics of a smooth surface, we can analyze the provided options step by step.

### Step-by-Step Solution:

1. **Understanding Friction**:
- Friction is a force that opposes the motion of an object. It depends on the nature of the surfaces in contact.

2. **Characteristics of Smooth Surfaces**:
- Smooth surfaces are typically characterized by having less roughness compared to rough surfaces. This smoothness reduces the amount of interlocking between the surfaces, leading to lower friction.

3. **Analyzing the Options**:
- **Option 1: Less friction force**: This option suggests that smooth surfaces have less friction, which is true. Smooth surfaces allow objects to slide over them more easily.
- **Option 2: More friction force**: This option is incorrect because smooth surfaces do not create more friction; they create less.
- **Option 3: Sometimes less, sometimes more**: This option is misleading. Smooth surfaces consistently have less friction compared to rough surfaces.
- **Option 4: All of the above**: This option cannot be correct because options 2 and 3 are incorrect.

4. **Conclusion**:
- Based on the analysis, the correct option is **Option 1: Less friction force**. Smooth surfaces are characterized by having less friction.

### Final Answer:
**The correct option is: Less friction force (Option 1).**