Question

why sliding friction is greater than rolling friction??

please tell me

Answer 1

Rolling friction is less than the sliding friction because the area of contact is smaller in rolling friction than in sliding friction. The main advantage of this is that we… can reduce the friction between the bodies which are sliding over each other by replacing the ball bearings and rollers.

Answer 2

Rolling friction is the resistance to motion experienced by a body when it rolls upon another. It is much less than sliding friction for same pair of bodies. When one body rolls upon another, there is theoretically no sliding or slip between them. And if both are perfectly rigid, there is no surface of contact.

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