The term rolling friction refers to the resistance created by an object rolling across a surface. Synonymous terms include rolling drag and rolling resistance.
The amount of friction created by a rolling object is less than the friction created by normal force. It is dramatically less than other types of friction, such as sliding friction.
The actual rolling friction can be measured and expressed as a number multiplied by the normal force.
There are various factors that can affect rolling friction such as:
Any ball or wheel has rolling friction when rolled on a surface. Some examples of items that have rolling friction are:
As you can see, many everyday objects use rolling friction. There are examples everywhere in the world.