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Answer:
if the object is smooth
friction is less
if the object is rough
friction is more
more the weight of the moving object
more is the friction
more the area of the object in contact
what is the friction
Answer:
Friction depends upon:---
(I)
Friction depends partly on the smoothness of the contacting surfaces, a greater force being needed to move two surfaces past one another if they are rough than if they are smooth.
(2)
When two surface is rough then the friction is more because the interlocking is very strong in very rough surface.
3 .
When an object is placed on a surface, the weight of the object presses on that surface. The surface exerts an equal and oppo- site reaction force on the object. ... Friction depends on the total force pressing the surfaces together, not on how much area this force acts over. Consider a rectangular cardboard box.
4.
Greater contact area means greater frictional force. If the contact area is proportional to the normal force, then this looks just like Amontons' Law with the frictional force proportional to the normal force.