NEET Physics NLM, Friction, Circular Motion NEET PYQ-NLM Friction Circular Motion

  • question_answer
    Which one of the following statements is incorrect?                                     [NEET - 2018]

    A) Frictional force opposes the relative motion.

    B) Limiting value of static friction is directly proportional to normal reaction.

    C) Rolling friction is smaller than sliding friction.

    D) Coefficient of sliding friction has dimensions of length.

    Correct Answer: D

    Solution :

    [d] Coefficient of sliding friction has no dimension.
    \[f={{\mu }_{s}}N\]
    \[\Rightarrow {{\mu }_{s}}=\frac{f}{N}\]


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