(A) : Polishing a surface beyond a certain limit increases r han decreases the frictional forces .
Channel: Doubtnut
Date: 2020-04-19

(A) : Polishing a surface beyond a certain limit increases rather than decreases the frictional forces .   When the surface is polished beyond a certain limit , the molecules exert strong attractive force . This is called surface adhesion , to overcome which additional force is required . Hence frictional force increases .