Question

A RIDDLE FOR U
in someone situation I oppose the motion in others situation i facilitate the motion but I always oppose the relative motion between two moving surface put some lubricant and I become small there make a moving surface rough I make the movement tough I maybe skates sliding or rolling but I whenever two surface are in motion I am always there tell me who I am ​

Answer 1

Answer:

uh it's simple

Explanation:

friction duh!

Answer 2

Answer:

answer of this question is sliding