Question

Define force of friction with an example?????

Answer 1

Force of friction:
friction always needs 2 surfaces that r in contact with each other/ move in contact with each other..
(Friction is more when the surface is rough)
(Friction is less when surface is smooth)
example: ball rolling down from a slide so it will roll faster as friction is less there but if the ball is rolling in a rough surface so it will roll slowly as fiction is more than..

hope it helps..