Q. Friction can be increased by

घर्षण को बढ़ाया जा सकता है

A
Polishing the surface
सतह को चमकाना
B
Using lubricants
स्नेहक का उपयोग करना
C
Making surfaces rough
सतहों को खुरदुरा बनाना
D
Making surfaces smooth
सतहों को चिकना बनाना

Explanation

Rough surfaces have more irregularities, leading to greater contact and interlocking between surfaces, thus increasing friction. Polishing or lubricating makes surfaces smooth or coated, reducing friction.

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