I had asked whether the frictional force depends on the surface area in contact but the expets says no...
So why does the rolling friction less than that of sliding friction...?
Sliding friction is the friction which an object experience when it is slid over a surface but the rolling friction is experienced when an object rolls over a surface...
Ex. Sliding friction - Moving a box over a floor
Rolling friction - moving a box over floor by putting small cylinders under it