Question

How we can increase and decrease the friction some points

Answer 1

Explanation:

1. we can increase the friction by making the path rough.
2. If we give air to the object (in front of object)the drag will also increase the frictional force

we can decrease the friction by:

1. we can make the path(of the object) smooth to reduce the frictional force.

Answer 2

Explanation:

we can increase the friction by making the surface more rough

we can decrease the friction by lubricating oil water on a surface and even by making the surface smoother