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Q.

Which of the following statements is correct about friction?

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a

Static friction depends on the area of contact

b

Kinetic friction depends on the area of contact

c

Coefficient of static friction does not depend on the surfaces in contact

d

Coefficient of kinetic friction is less than the coefficient of static friction

answer is D.

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Detailed Solution

Both static and kinetic friction are independent on the area of contact Coefficient of static friction depends on the surfaces in contact∴    μk<μs
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