Fill in the following blanks with suitable words :
Sliding friction is……………………… than the static friction.

Options

A. Lesser
B. more
C. Smaller
D. Both A and C

Explanation

**Step-by-Step Text Solution:**

1. **Understanding the Types of Friction**:
- Friction is a force that opposes the relative motion of two surfaces in contact. There are different types of friction: static friction, sliding (or kinetic) friction, and rolling friction.

2. **Defining Static Friction**:
- Static friction is the frictional force that prevents two surfaces from sliding past each other. It acts when an object is at rest relative to another surface.

3. **Defining Sliding Friction**:
- Sliding friction, also known as kinetic friction, occurs when two surfaces slide against each other. This type of friction comes into play once the object starts moving.

4. **Comparing Static and Sliding Friction**:
- It is important to note that static friction is generally greater than sliding friction. This means that it requires more force to start moving an object at rest than to keep it moving once it has started sliding.

5. **Filling in the Blank**:
- Based on the understanding that static friction is greater than sliding friction, we can fill in the blank: "Sliding friction is **less** than the static friction."

**Final Answer**: Sliding friction is **less** than the static friction.

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