Question

A riddle for you
In some situations, I oppose the motion
in other situations, I facilitate the motion
but I always oppose
the relative motion
between two moving surfaces.
Put some lubricant, and
I become small there.
Make the moving 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

Answer:

Circular motion is the right answer

Answer 2

Answer:

Friction is the correct answer