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NEET Sample Paper NEET Sample Test Paper-65

  • question_answer
    A wooden block of volume \[1000\text{ }c{{m}^{3}}\] is suspended from a spring balance. It weighs 12 N in air. It is suspended in water such that half of the block is below the surface of water. The reading of the spring balance is

    A) 10 N                

    B) 9 N

    C) 8 N                              

    D) 7 N

    Correct Answer: D

    Solution :

    Reading of the spring balance = Apparent weight of the block \[= Actual weight - upthrust\]  \[=\,\,12\,-\,{{V}_{in}}\,\sigma g\] \[= 12 - 500 \times  1{{0}^{-}}^{6}\times  1{{0}^{3}}\times  10 = 12 - 5 = 7 N\]


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