What do you meant by rolling friction?
Answers
The force of friction that exists between two surfaces when a body rolls over the other body is called rolling fiction.
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Rolling friction is the force resisting the motion of a rolling ball or wheel (a curved surface). This type of friction is typically a combination of several friction forces at the point of contact between the wheel and the ground or other surface.
It is the weakest type of friction (compared to static and sliding friction). This is the reason that wheels and ball bearings facilitates motion.W is some vertical load on the axle, F is some towing force applied to the axle, r is the wheel radius, and both friction with the ground and friction at the axle are assumed to be negligible and so are not shown. The wheel is rolling to the left at constant speed.
