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NEET Sample Paper NEET Sample Test Paper-20

  • question_answer
    A body having volume V and density p is attached to the bottom of a container as shown in the figure. Density of the liquid is d \[d(>\rho ).\] The container  has a constant upward acceleration a. Tension in the string is

    A) \[V[dg-\rho (g+a)]\]    

    B) \[V(g+a)(d-\rho )\]

    C)      \[V(d-\rho )g\] 

    D)       None of these 

    Correct Answer: B

    Solution :

    If container is at rest, \[T=dV\,g-\rho Vg=(d-\rho )V\,g\] When container has an upward acceleration a, the effective gravity in frame of container is g' = g + a downwards. \[\therefore \]\[T=(d-\rho )Vg'=(d-\rho )V(g+a)\] Hence, the correction option is (b).


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