Why is sliding friction less than static friction

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Solution

Friction occurs due to the interlocking of irregularities in the two surfaces. When the object starts sliding the contact points on its surface, do not get enough time to lock into the contact points on the floor. So sliding friction is slightly less than the static friction.

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Q. Explain why the sliding friction is less than the static friction.

Which of the following statements is incorrect?
(a) static friction is greater than rolling friction
(b) sliding friction is less than rolling friction
(c) rolling friction is less than static friction
(d) static friction is greater than sliding friction

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