Frictional force increases when surfaces in contact are made very smoo

1.	Frictional force increases when surfaces in contact are made very smooth, because of
A.	Molecular force
B.	Decrease in surface area
C.	Decrease in irregularities
D.	Increase in area
Answer» B. Decrease in surface area

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Frictional force increases when surfaces in contact are made very smooth, because of

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