Class 8 Exam > Class 8 Questions > Which of the following statements is NOT true...
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Which of the following statements is NOT true?
- a)Friction can be reduced by converting sliding friction into rolling friction.
- b)Friction in air and water can be reduced by streamlining the shape of the objects.
- c)A polished surface will have less friction.
- d)Friction can be reduced to zero.
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is NOT true?a)Friction can be reduce...
Statement (A), (B) and (C) are correct.
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Which of the following statements is NOT true?a)Friction can be reduce...
Understanding Friction
Friction is a force that opposes the relative motion between two surfaces in contact. While it can be managed and reduced, it cannot be completely eliminated. Here's why option 'D' is the correct answer:
Friction Reduction Techniques
- Converting Sliding to Rolling Friction:
- Sliding friction is generally higher than rolling friction. By using wheels or ball bearings, we can significantly reduce friction.
- Streamlining Shapes:
- In fluids like air and water, the shape of an object can impact friction. A streamlined object reduces resistance, thus lowering frictional forces.
- Polished Surfaces:
- A polished surface minimizes surface roughness, which decreases frictional contact between the surfaces.
Why Friction Cannot be Reduced to Zero
- Molecular Interactions:
- At the microscopic level, surfaces are never perfectly smooth. Even polished surfaces have irregularities that create friction.
- Physical Presence:
- Friction is a fundamental force that arises from the contact of materials. Eliminating all forms of contact (which is practically impossible) is required to achieve zero friction.
- Practical Applications:
- In real-world scenarios, friction is necessary for movement control, walking, and holding objects. Completely eliminating it would lead to instability and loss of control.
In conclusion, while we can reduce friction through various methods, achieving a state of zero friction is not feasible in practice.
Friction is a force that opposes the relative motion between two surfaces in contact. While it can be managed and reduced, it cannot be completely eliminated. Here's why option 'D' is the correct answer:
Friction Reduction Techniques
- Converting Sliding to Rolling Friction:
- Sliding friction is generally higher than rolling friction. By using wheels or ball bearings, we can significantly reduce friction.
- Streamlining Shapes:
- In fluids like air and water, the shape of an object can impact friction. A streamlined object reduces resistance, thus lowering frictional forces.
- Polished Surfaces:
- A polished surface minimizes surface roughness, which decreases frictional contact between the surfaces.
Why Friction Cannot be Reduced to Zero
- Molecular Interactions:
- At the microscopic level, surfaces are never perfectly smooth. Even polished surfaces have irregularities that create friction.
- Physical Presence:
- Friction is a fundamental force that arises from the contact of materials. Eliminating all forms of contact (which is practically impossible) is required to achieve zero friction.
- Practical Applications:
- In real-world scenarios, friction is necessary for movement control, walking, and holding objects. Completely eliminating it would lead to instability and loss of control.
In conclusion, while we can reduce friction through various methods, achieving a state of zero friction is not feasible in practice.
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Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer? for Class 8 2024 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 8 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer?.
Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer? for Class 8 2024 is part of Class 8 preparation. The Question and answers have been prepared according to the Class 8 exam syllabus. Information about Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 8 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer?.
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Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer?, a detailed solution for Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer? has been provided alongside types of Which of the following statements is NOT true?a)Friction can be reduced by converting sliding friction into rolling friction.b)Friction in air and water can be reduced by streamlining the shape of the objects.c)A polished surface will have less friction.d)Friction can be reduced to zero.Correct answer is option 'D'. Can you explain this answer? theory, EduRev gives you an
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