Question

how friction helps moving on different surfaces

Answer 1

moving body will experience friction if it is travelling in a medium. But, as the object is moving with a constant velocity, it could be either moving in a vacuum or a constant force is being applied on the body in the direction of motion such that the net acceleration remains zero.

Answer 2

HEY MATE_____>

FRICTION helps us any many ways while walking on different surfaces !

Ruff surface have so many interlocking , increases the presence of friction while Smooth surface have a little interlocking , due to which friction decreases and lets us to fall on the ground !

Ruff Surface :- Ground Surface , Roads , etc.
Smooth Surface :- Marble floor , etc.

I THINK IT HELPED YOU ^