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Question & Answer1
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Explore TopicChoose the Best Answer
A
It increases the friction coefficient, enhancing grip.
B
It decreases the friction coefficient, reducing grip.
C
It has no effect on the friction coefficient.
D
It only affects the static friction coefficient, not kinetic.
Understanding the Answer
Let's break down why this is correct
Answer
Increasing the surface roughness of two sliding objects causes more microscopic interlocking between their asperities, which raises the normal force’s resistance to relative motion. This interlocking increases the friction coefficient, both static and kinetic, because more force is needed to initiate or maintain sliding. On an incline, a higher friction coefficient means a larger component of the weight is opposed by friction, so the block accelerates more slowly or may even stay at rest if the incline is shallow. For example, a wooden block on a roughened metal plate might have a coefficient of 0. 3 on a smooth surface, but after roughening it could rise to 0.
Detailed Explanation
When a surface gets rougher, its bumps and grooves fit together more tightly. Other options are incorrect because The misconception is that smoother surfaces lower friction; Many think texture has no effect, but roughness changes how many bumps touch.
Key Concepts
Friction Coefficient
Surface Roughness
Inclined Planes
Topic
Friction Coefficient Variations
Difficulty
hard level question
Cognitive Level
understand
Practice Similar Questions
Test your understanding with related questions
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Question 1How does the texture of a surface influence the amount of friction experienced when two materials are in contact with each other?
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Question 2How does increasing the angle of an incline affect the frictional force acting on an object resting on it?
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Question 3When an object slides down a ramp made of rubber at a steep angle, how does the combination of the angle of incline and the material affect the frictional force experienced by the object?
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Question 4How does increasing the angle of incline of a ramp affect the normal force acting on an object resting on it?
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Question 5How does surface roughness influence the frictional interaction between two materials?
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Question 6How does increasing surface roughness affect the friction coefficient between two sliding surfaces?
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Question 7Surface roughness:Coefficient of friction :: Surface area:?
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