What is rolling friction ? ……
Answers
Answer:
Rolling friction occurs when a wheel, ball, or cylinder rolls freely over a surface, as in ball and roller bearings.
When an object rolls over the surface of another object, the force of friction that acts on the object is called rolling friction.
The friction that exists between a surface sliding on another surface is called sliding friction.
The value of rolling friction is less than the value of sliding friction.
Static friction > sliding friction > Rolling friction
An example where sliding sliding friction is replaced by rolling friction is the luggage bags and briefcases, which are often provided with wheels so that they can be rolled easily.
You must have seen LPG cylinders being rolled on the ground rather than dragged ? This is because of the fact that rolling friction is lesser than sliding friction. This means that the force required to overcome rolling friction is less in magnitude than the force required to overcome sliding friction.