JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Sample Paper Topic Test - Work Energy Power

  • question_answer
    A block of mass m is pulled by a constant power P placed on a rough horizontal plane. The friction coefficient between the block and the surface is \[\text{I}{{\text{F}}_{\text{3}}}\]. Maximum velocity of the block will be

    A)  \[\frac{\mu p}{mg}\]

    B)  \[\frac{\mu mg}{p}\]

    C)  \[\mu mgp\]

    D) \[\frac{p}{\mu mg}\]

    Correct Answer: D

    Solution :

    [d] \[\therefore P=F.V=constant\]
      When \[F=\mu mg\] net force on block becomes zero, i.e., it has maximum or terminal velocity
      \[\therefore \]        \[p=(\mu mg){{V}_{\max }}\]
      \[\therefore \]         \[{{V}_{\max }}=\frac{P}{\mu mg}\]

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