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JEE Main & Advanced Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन Question Bank Pascal's Law and Archimedes Principle

  • question_answer
    A cork is submerged in water by a spring attached to the bottom of a bowl. When the bowl is kept in an elevator moving with acceleration downwards, the length of spring

    A)            Increases                               

    B)            Decreases                             

    C)            Remains unchanged         

    D)            None of these

    Correct Answer: B

    Solution :

               Effective weight \[W'=m(g-a)\] which is less than actual weight mg, so the length of spring decreases.


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