Friction is not necessary to maintain rolling motion on a horizontal surface once the object is already rolling without slipping. The object continues to roll due to its rotational speed matching its translational speed, resulting in zero relative motion at the point of contact. Although static friction is essential for initiating rolling motion, it does not play a role in sustaining it under ideal conditions. Real-world factors such as rolling friction and surface deformation may eventually slow the object down.
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No, not if the surface is horizontal. Once an object is rolling along a horizontal surface, no static friction is required to maintain that rolling motion. (Of course, in 'real life' deformation and rolling friction will slow the object down.)paragchitnis said:Friction is necessary to make motion rolling but if the body is already in rolling motion on rough surface without slipping then, is friction necessary to continue the rolling motion ?
In an abstract, imaginary situation, the object would just happen to be rotating at a rate where it's circumference surface speed is the same as the speed that the object is moving forwards.a.ratnaparkhi said:Friction force occurs due to cold locking between the crests and troughs of rough surface and the surface of the body. So without such locking, how could it roll?