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Railways NTPC (Technical Ability) Engineering Mechanics and Strength of Materials Question Bank Engineering Mechanics

  • question_answer
    A uniform chain of length L and mass M lying on a smooth table such that one third of its length is hanging vertically down over the edge of the table. If g is the acceleration due to gravity, the work required to pull the hanging part on to the table is:

    A) MgL                             

    B) MgL/3

    C) MgL/9              

    D) MgL/18

    Correct Answer: D

    Solution :

    Work done \[=(Mg/6)\times L/3=Mg\,\,L/18\]


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