Question

Why rolling reduces friction???​

Answer 1

A wheel reduces friction by allowing the contacting surfaces to roll rather than to drag or slide over each other. By reducing friction, a wheel can enable you to use less force to move an object. The less force you use to move an object, the easier your work becomes

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Answer 2

rolling reduces friction because, a very less part of that rolling thing gets touched to the earth or the surface where it is kept.