Assertion: It is convenient to pull luggage fitted with rollers
Reason: Rolling friction is smaller than sliding friction.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If oth assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reason is false
D. If both assertion and reason are false

Answer

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

### Step 1: Understand the Assertion
The assertion states: "It is convenient to pull luggage fitted with rollers."
- This means that having rollers on luggage makes it easier to move or transport the luggage.

### Step 2: Understand the Reason
The reason states: "Rolling friction is smaller than sliding friction."
- This means that when an object rolls (like a wheel or roller), it encounters less resistance compared to when it slides across a surface.

### Step 3: Connect the Assertion and Reason
- When luggage has rollers, it can roll instead of slide. Since rolling friction is less than sliding friction, it requires less force to pull the luggage with rollers compared to dragging it without rollers.

### Step 4: Determine the Truth of Assertion and Reason
- Both the assertion and the reason are true. The assertion is correct because luggage with rollers is indeed more convenient to pull. The reason is also correct because rolling friction is indeed less than sliding friction.

### Step 5: Conclusion
- Since both the assertion and the reason are true, and the reason correctly explains the assertion, we conclude that the correct answer is that both the assertion and reason are true, and the reason is the correct explanation for the assertion.

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

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