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JEE Main & Advanced Physics Work, Energy, Power & Collision / कार्य, ऊर्जा और शक्ति Question Bank Self Evaluation Test - Work, Energy and Power

  • question_answer
    A block of mass m is suspended by a light thread from a lift. The lift is moving upward with uniform velocity v. From the frame of lift, the work done by tension on the block in t seconds will be

    A) \[-mgvt\]

    B) \[0\]       

    C)  \[\frac{mgvt}{2}\]

    D) \[mgvt\]

    Correct Answer: B

    Solution :

    [b] In the frame of lift displacement is zero, So \[W=F.\text{ }S=T.\text{ }S=0.\]


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