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Which is true for rolling friction (µ_r), static friction (µ_s) and kinetic friction (µ_k) ?

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μs>μk>μr

μs<μk<μr

μs<μk>μr

μs>μr>μk

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detailed solution

Correct option is A

μs>μk>μrThe rolling fiction is always less than sliding friction. Therefore, it is easy to move a heavy load from one place to another by rolling it over the surface instead of sliding it over the same surface.

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