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MGIMS WARDHA MGIMS WARDHA Solved Paper-2008

  • question_answer
    A rubber cord 10 m long is suspended vertically. How much does it strech under its own weight? (Density of rubber is  \[1500\text{ }kg/{{m}^{3}},\] \[Y=5\times {{10}^{8}}N/{{m}^{2}},g=10\text{ }m/{{s}^{2}})\]

    A) \[15\times {{10}^{-4}}m\]                           

    B) \[7.5\times {{10}^{-4}}m\]

    C) \[12\times {{10}^{-4}}m\]                           

    D) \[25\times {{10}^{-4}}m\]

    Correct Answer: A

    Solution :

    \[l=\frac{{{L}^{2}}dg}{2Y}\] \[=\frac{{{(10)}^{2}}\times 1500\times 10}{2\times 5\times {{10}^{8}}}=15\times {{10}^{-4}}m\]


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