question_answer

44.      A thick copper rope of density \[1.5\times {{10}^{3}}kg/{{m}^{3}}\]and young's modulus \[5\times {{10}^{6}}N/{{m}^{2}},\text{ }8m\] in length is hung from the ceiling of a room. The increase in its length due to its own weight is

A)  \[\text{9}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-5}}}\text{m}\]                       

B)  \[\text{19}\text{.6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-7}}}\text{m}\]

C)  \[\text{19}\text{.2 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-7}}}\text{m}\]                     

D) \[\text{9}\text{.6}\,\text{m}\]