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When two surface are polished, the frict...

When two surface are polished, the friction coefficient between them decreases. But the friction coefficient increases and becomes very large if the surfaces are made highly smooth. Explain.

A

Both (A) and (R) are true and (R) is the correct explanation of (A)

B

Both (A) and (R) are true and (R) is not the

C

(A) is true but ( R) is false

D

Both (A) and (R ) are false

Text Solution

Verified by Experts

The correct Answer is:
B
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