Assertion : It is difficult to move a cylce along the roda with its brakes on .
Reason : Sliding friction is greater than rolling friction.

Options

A. Rolling friction opposes motion on road
B. Sliding friction opposes motion on road
C. Rolling friction is more than sliding friction
D. Sliding friction is more than the rolling friction

Answer

To solve the question, we need to analyze the assertion and the reason provided.

### Step 1: Understand the Assertion
The assertion states that "It is difficult to move a cycle along the road with its brakes on." This implies that when the brakes are applied, the cycle does not move easily.

**Hint:** Consider what happens to the wheels of the cycle when the brakes are applied.

### Step 2: Analyze the Reason
The reason given is that "Sliding friction is greater than rolling friction." This means that when the cycle's wheels are not rolling (due to the brakes being applied), the friction opposing the motion becomes greater.

**Hint:** Think about the difference between sliding and rolling motion in terms of friction.

### Step 3: Relate Assertion and Reason
When the brakes are applied, the wheels of the cycle stop rotating. This leads to a situation where the cycle is subject to sliding friction rather than rolling friction. Since sliding friction is indeed greater than rolling friction, it becomes more difficult to move the cycle.

**Hint:** Reflect on how the type of friction changes when the wheels are locked versus when they are rolling.

### Step 4: Conclusion
Both the assertion and the reason are true. The assertion is correct because it is indeed difficult to move a cycle with its brakes on, and the reason is also correct because sliding friction is greater than rolling friction. Therefore, the reason correctly explains the assertion.

**Final Answer:** Both the assertion and the reason are true, and the reason is the correct explanation for the assertion.

### Summary of Steps:
1. Understand the assertion about difficulty in moving the cycle with brakes on.
2. Analyze the reason about the difference between sliding and rolling friction.
3. Relate the assertion and reason to conclude their validity.
4. State the final conclusion.