Assertion (A): In metal cutting, the normal laws of sliding friction are not applicable.
Reason (R): Very high temperature is produced at the tool-chip interface.
Option (A)
Both A and Rare true and R is the correct explanation of A
Option (B)
Both A and R are true but R is NOT the correct explanation of A
A is true but R is false
A is false but R is true
Correct Option:
Question Solution:
Laws of friction does not account the effect of temperature. So normal laws of friction are not applicable