Question

Why does sandpaper produce a lot of friction?​

Answer 1

Answer:

It it is the area of all the microscopic contact points between the two objects. The more contact area the higher the friction. ... As the sandpaper got to a certain roughness the grains of sand where larger which decreased the over all contact area and reduced the friction.

plz follow me

Answer 2

Answer:

because it has too much barriers and rough and small things which makes object to Be less frictionous.and create barriers