Which of the following statements is/are correct?
Friction reduces relative velocity
It supports motion of one and opposes the motion of the other

Options

A. Only I Is correct
B. Only II Is correct
C. Both I and II are correct
D. Neither I nor II Is correct

Answer

To solve the question regarding the correctness of the statements about friction, let's analyze each statement step by step.

### Step 1: Analyze the first statement
**Statement 1:** "Friction reduces relative velocity."

- Friction acts between two surfaces in contact. When one body tries to move relative to the other, friction opposes this relative motion.
- If we consider two blocks, where one block is trying to slide over the other, the friction force will act to oppose the motion of the sliding block.
- This means that the velocity of the sliding block decreases due to the friction force acting against it.
- Simultaneously, the friction force will cause the other block to accelerate in the direction of the applied force (if any).
- Therefore, the relative velocity between the two blocks decreases because the sliding block's velocity is reduced while the other block's velocity is increased.

**Conclusion for Statement 1:** This statement is **correct**.

### Step 2: Analyze the second statement
**Statement 2:** "It supports motion of one and opposes the motion of the other."

- In the context of two blocks, if we apply a force to one block, the friction between the two blocks will act in opposite directions.
- For example, if block 1 is being pushed to the right, the friction force acting on block 1 will be to the left (opposing its motion).
- Conversely, the friction force acting on block 2 (which is in contact with block 1) will act to the right, supporting its motion in the direction of the applied force.
- This means that friction indeed supports the motion of one block while opposing the motion of the other.

**Conclusion for Statement 2:** This statement is also **correct**.

### Final Conclusion
Both statements are correct. Therefore, the answer to the question is that both statements are true.

### Summary of the Solution:
- **Statement 1:** Correct (Friction reduces relative velocity).
- **Statement 2:** Correct (Friction supports motion of one and opposes the motion of the other).
- **Final Answer:** Both statements are correct.

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