Question

Why the surface of the conveyor belt made rough

Answer 1

the surface of the conveyor belt made rough to increase the surface between belt and to be material carried so that the material do not slip aur fall down from the belt.

Answer 2

The surface of conveyor belt is made rough to increase the friction between the object and belt. Friction between object and belt does not allow the object to get a slip from the belt and it can easily move on it.