Why rolling friction is less than sliding friction?
two or three sentences are enough
Answers
Explanation:
Answer: Rolling friction must always be less than sliding friction, because in order for an object to roll, the force of friction between it and the surface must be large enough to keep the object from sliding. Explanation: ... When one body rolls upon another, there is theoretically no sliding or slip between them.
Explanation:
Rolling friction is considerably less than sliding friction as there is no work done against the body that is rolling by the force of friction. For a body to start rolling a small amount of friction is required at the point where it rests on the other surface, else it would slide instead of roll. This is provided by the static friction between a small part that is in contact with the surface it would roll on.