Q.

[[1]] friction is less than sliding friction.


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Detailed Solution

Rolling friction is less than sliding friction.
Sliding friction occurs due to the interlocking of two surfaces because, in sliding friction, the surface of an object is trying to slide over the other surface. And in rolling friction, the force opposes the object from rolling over the other surface. And when we use to move heavy objects from one place to another, we use the roller to reduce friction between the surfaces.
 
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