Question

By referring to the normal force, explain why the friction between an object and a surface is less when the surface is tilted than when the same surface is horizontal.

Answer 1

The frictional force depends directly on how hard gravity is pulling on the object against the surface. The more you tilt the surface, the less the gravitational force is. Sliding often causes less friction than pushing and pulling.

Step-by-step explanation:

Friction is proportional to the force with which an object pushes against the surface you're trying to slide it along.

You slide the object more softly than when you push or pull it. For example, put a block of ice on a bench, then tilt the bench, and it softly moves.