Question

What is meant by rolling friction? ​

Answer 1

Rolling resistance, sometimes called rolling friction or rolling drag, is the force resisting the motion when a body (such as a ball, tire, or wheel) rolls on a surface.

Answer 2

rolling friction indicates the friction experienced by a body when it's in rolling motion, this force is tangential to the surface of the body. The body experiencing this kinda friction is a round object .

Hope this helps :)