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JEE Main & Advanced JEE Main Solved Paper-2017

  • question_answer
    A man grows into a giant such that his linear dimensions increase by a factor of 9. Assuming that his density remains same, the stress in the leg will change by a factor of :   JEE Main Solved Paper-2017

    A)  81                                         

    B)  \[\frac{1}{81}\]

    C)  9                                            

    D)  \[\frac{1}{9}\]

    Correct Answer: C

    Solution :

     \[Stress=\frac{Force}{area}=\frac{mg}{A}\] \[=\frac{volume\times density\times g}{Ara}\]                \[Stress=\frac{{{L}^{3}}\rho g}{{{L}^{2}}}\]\[Stress\propto L\]


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