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Which of the following statements about friction is true?
- a)Friction can be reduced to
- b)Friction force can accelerate a body
- c)Friction force is proportional to the area of contact between the two surfaces.
- d)Kinetic friction is always greater than rolling friction.
Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements about friction is true?a)Friction c...
The initial force to get an object moving is often dominated by static friction. The static friction is, in most cases, higher than the kinetic friction. Rolling friction is the frictional force that occurs when one object rolls on another, like a car's wheels on the ground.
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Which of the following statements about friction is true?a)Friction c...
Friction: An Overview
Friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It arises due to the irregularities present on the surfaces in contact. Friction plays a crucial role in our daily lives and has both advantageous and disadvantageous effects.
Understanding the Statements
Let's analyze each statement one by one to determine which one is true.
a) Friction can be reduced to:
This statement is false. Friction cannot be reduced to zero. It can only be minimized or reduced to a certain extent by using lubricants, polishing the surfaces, or making them smoother. However, complete elimination of friction is not possible.
b) Friction force can accelerate a body:
This statement is true. Friction force can indeed accelerate a body. When an external force is applied to a body, the friction force acts in the opposite direction, impeding the motion. However, if the applied force is greater than the frictional force, the body will accelerate.
c) Friction force is proportional to the area of contact between the two surfaces:
This statement is false. Friction force is not directly proportional to the area of contact between two surfaces. It depends on the nature of the surfaces, the force normal to the surfaces, and the coefficient of friction. The area of contact does not play a significant role in determining the magnitude of friction.
d) Kinetic friction is always greater than rolling friction:
This statement is true. Kinetic friction, also known as sliding friction, occurs when two surfaces slide against each other. Rolling friction, on the other hand, occurs when a body rolls over a surface. In general, kinetic friction is greater than rolling friction. This is because sliding surfaces have more contact points and greater interaction between them, leading to a higher frictional force compared to rolling surfaces.
Conclusion
Among the given statements, the only true statement is that kinetic friction is always greater than rolling friction. This is due to the increased interaction and contact points in sliding surfaces. It is important to have a clear understanding of friction to comprehend its effects and applications in various fields.
Friction is a force that opposes the relative motion or tendency of motion between two surfaces in contact. It arises due to the irregularities present on the surfaces in contact. Friction plays a crucial role in our daily lives and has both advantageous and disadvantageous effects.
Understanding the Statements
Let's analyze each statement one by one to determine which one is true.
a) Friction can be reduced to:
This statement is false. Friction cannot be reduced to zero. It can only be minimized or reduced to a certain extent by using lubricants, polishing the surfaces, or making them smoother. However, complete elimination of friction is not possible.
b) Friction force can accelerate a body:
This statement is true. Friction force can indeed accelerate a body. When an external force is applied to a body, the friction force acts in the opposite direction, impeding the motion. However, if the applied force is greater than the frictional force, the body will accelerate.
c) Friction force is proportional to the area of contact between the two surfaces:
This statement is false. Friction force is not directly proportional to the area of contact between two surfaces. It depends on the nature of the surfaces, the force normal to the surfaces, and the coefficient of friction. The area of contact does not play a significant role in determining the magnitude of friction.
d) Kinetic friction is always greater than rolling friction:
This statement is true. Kinetic friction, also known as sliding friction, occurs when two surfaces slide against each other. Rolling friction, on the other hand, occurs when a body rolls over a surface. In general, kinetic friction is greater than rolling friction. This is because sliding surfaces have more contact points and greater interaction between them, leading to a higher frictional force compared to rolling surfaces.
Conclusion
Among the given statements, the only true statement is that kinetic friction is always greater than rolling friction. This is due to the increased interaction and contact points in sliding surfaces. It is important to have a clear understanding of friction to comprehend its effects and applications in various fields.
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Which of the following statements about friction is true?a)Friction can be reduced tob)Friction force can accelerate a bodyc)Friction force is proportional to the area of contact between the two surfaces.d)Kinetic friction is always greater than rolling friction.Correct answer is option 'D'. Can you explain this answer?
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Which of the following statements about friction is true?a)Friction can be reduced tob)Friction force can accelerate a bodyc)Friction force is proportional to the area of contact between the two surfaces.d)Kinetic friction is always greater than rolling friction.Correct answer is option 'D'. Can you explain this answer? for SSC 2024 is part of SSC preparation. The Question and answers have been prepared according to the SSC exam syllabus. Information about Which of the following statements about friction is true?a)Friction can be reduced tob)Friction force can accelerate a bodyc)Friction force is proportional to the area of contact between the two surfaces.d)Kinetic friction is always greater than rolling friction.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for SSC 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following statements about friction is true?a)Friction can be reduced tob)Friction force can accelerate a bodyc)Friction force is proportional to the area of contact between the two surfaces.d)Kinetic friction is always greater than rolling friction.Correct answer is option 'D'. Can you explain this answer?.
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