Which one of the following statements is incorrect ? (1) Rolling fricti...

Which one of the following statements is incorrect ?  (1) Rolling friction is smaller than sliding friction  (2) Limiting value of static friction is directly proportional to normal reactions  (3) Frictional force opposes the relative motion  (4) Coefficient of sliding friction has dimensions of length

Neet 2018 NLM & Frctn q 1 its a theoretical qus where we need to check every option one by one. Generally people deal casually with theoretical qus in exam since no calculation is involved but let me tell you . Chances of negative are more in such qus because of this casual attitude

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