(Okay so I have asked this in a previous post but I think this should be a separate question)
Consider a cylinder performing accelerated pure rolling (Static friction is non-zero) on a sufficiently rough surface.
The point of contact keeps changing since the body is rolling. Now I understand rotational work to the work done by a torque to rotate a body by some angle. The torque is provided by a force which is applied to a PARTICULAR POINT of the body and stays in contact with that PARTICULAR POINT for the entire rotation (let us say by an angle A). However, this is what confuses me, In pure rolling the point of contact is at rest and is not displaced at that particular instant when it is in contact with the surface, the point of contact then changes when the body rolls. Now if the initial point of contact was at rest (Was not displaced by A) then how can friction do rotational work ?