Sliding friction is ____than static friction

Options

A. Smaller
B. Greater
C. Smaller as well as greater
D. None of these

Explanation

**Step-by-Step Solution:**

1. **Understanding Friction Types**:
- Friction is the resistance that one surface or object encounters when moving over another. There are two main types of friction to consider: static friction and sliding (kinetic) friction.

2. **Definition of Static Friction**:
- Static friction is the frictional force that prevents two surfaces from sliding past each other. It acts when a force is applied to an object at rest, and it must be overcome for the object to start moving.

3. **Definition of Sliding Friction**:
- Sliding friction, also known as kinetic friction, occurs when two surfaces are sliding against each other. This type of friction acts on an object that is already in motion.

4. **Comparison of Static and Sliding Friction**:
- Static friction is generally greater than sliding friction. This is because, when an object is at rest, the microscopic surface irregularities between the two surfaces are interlocked more firmly, requiring a greater force to initiate movement.

5. **Conclusion**:
- Therefore, sliding friction is less than static friction. The correct answer to the question is that sliding friction is **smaller** than static friction.

**Final Answer**: Sliding friction is **smaller** than static friction.

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