Which statement is not true?a)Friction makes a moving object slow downb)Friction decreases the roughness of an objectc)Friction enables on object to stay in a stationary positiond)Friction is opposite to the forceCorrect answer is option 'B'. Can you explain this answer?

Question

Answer

Friction decreases the roughness of an object

Answer

Understanding Friction
Friction is a fundamental force that plays a crucial role in our daily lives. Let's explore why option 'B' is not true.
What is Friction?
- Friction is a force that opposes the motion of an object.
- It occurs between two surfaces in contact, such as between a shoe and the ground.
Analyzing Option B
- Statement: 'Friction decreases the roughness of an object.'
- This statement is incorrect because friction does not reduce the roughness of surfaces. Instead, it often emphasizes it.
- Rough surfaces create more friction due to increased contact area, while smooth surfaces have less friction.
Why Other Statements are True
- Option A: 'Friction makes a moving object slow down.'
- True! Friction acts against the direction of motion, causing deceleration.
- Option C: 'Friction enables an object to stay in a stationary position.'
- True! Friction helps objects remain in place, preventing them from sliding.
- Option D: 'Friction is opposite to the force.'
- True! Friction always acts in the direction opposite to that of the applied force.
Conclusion
In summary, friction is essential for various everyday activities, such as walking and driving. While it helps in slowing down moving objects and holding them in place, it does not decrease the roughness of surfaces. Thus, option 'B' is indeed not true.

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