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NEET Sample Paper NEET Sample Test Paper-93

  • question_answer
    A cylindrical block of area of cross-section A and of material of density p is placed in a liquid of density one-third of density of block. The block compresses a spring and compression in the spring is one-third of the length of the block. If acceleration due to gravity is g, the spring constant of the spring is

    A) \[\rho Ag\]         

    B)        \[2\rho Ag\]

    C) \[2\rho Ag/3\]    

    D)        \[\rho Ag/3\]

    Correct Answer: B

    Solution :

    [b] For the equilibrium of the block \[mg=kx+V\rho g\] \[\rho (Ah)g=k(h/3)+(Ah)\frac{\rho }{3}g\] \[\therefore \] \[k=2\rho Ag\]


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