Which of the following relations is/are correct?A.Rolling friction > Sliding frictionB.Rolling friction < Sliding frictionC.Limiting friction < Sliding frictionD.Both (a) and (c)
Question
Which of the following relations is/are correct?A.Rolling friction > Sliding frictionB.Rolling friction < Sliding frictionC.Limiting friction < Sliding frictionD.Both (a) and (c)
Solution
The correct relation is B. Rolling friction < Sliding friction.
Here's why:
A. Rolling friction > Sliding friction: This is incorrect. Rolling friction is generally less than sliding friction. This is because the contact between the surfaces in rolling is less compared to sliding.
B. Rolling friction < Sliding friction: This is correct. As mentioned above, the contact between the surfaces in rolling is less compared to sliding, which results in less friction.
C. Limiting friction < Sliding friction: This is incorrect. Limiting friction is the maximum friction that can be achieved before an object starts to slide. So, it cannot be less than sliding friction.
D. Both (a) and (c): This is incorrect because both A and C are incorrect.
So, the correct answer is B. Rolling friction < Sliding friction.
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