4. Sliding friction is less than static friction because *
(a) There are less irregularities in sliding friction
(b) Surfaces are smooth, that’s why they slide
(c) Sliding friction is not less than static friction, it is more.
(d) Irregularities don’t get time to interlock as one surface slides over the other
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(d) Irregularities don’t get time to interlock as one surface slides over the other.
As irregularities don't get time, friction produced is less.
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Answer:
option (d) that is Irregularities don’t get time to interlock as one surface slides over the other is the correct answer
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