The discussion revolves around the role of friction in maintaining rolling motion on rough surfaces, particularly whether friction is necessary once an object is already rolling without slipping. The scope includes theoretical considerations and conceptual clarifications related to rolling motion and frictional forces.
Participants do not reach a consensus on the necessity of friction for maintaining rolling motion, with multiple competing views presented regarding its role and implications.
Participants discuss assumptions about ideal conditions, such as a perfectly horizontal surface and the absence of other forces like deformation or rolling resistance, which may affect the conclusions drawn.
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?