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JEE Main & Advanced Sample Paper JEE Main Sample Paper-36

  • question_answer
    A wooden block of volume \[1000\text{ }cc\] is suspended from a spring balance. It weighs 12 N in air. It is then held suspended in water with half of it inside water. What would be the reading in spring balance now?

    A)  \[10\,N\]                      

    B)  \[9\,N\]

    C)  \[8\,N\]                        

    D)  \[7\,N\]

    Correct Answer: D

    Solution :

     Apparent wt. = Real wt.- Up thrust \[=12-\frac{1}{2}(1000\times {{10}^{-6}})\times {{10}^{3}}\times 10=12-5=7N\]


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