Question

In some situations I oppose the motion .in other situations , I Facilitate the motion but ,I always oppose the relative motion between two moveing surfaces. Put some lubricant, and I become small there . Moveing surfaces rough, I make the movement tough I may be - Static , sliding or rolling but whenever two surfaces are in motion I am always there tell me who I am !

Answer 1

✌hye.....✌
from my side it will be friction..☺☺

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