A) \[{{10}^{-5}}J\]
B) \[2.5\times {{10}^{-5}}J\]
C) \[5\times {{10}^{-5}}J\]
D) \[2.5\times {{10}^{-4}}J\]
Correct Answer: B
Solution :
\[U=\frac{1}{2}\frac{{{(stress)}^{2}}}{Y}\times volume\] \[=\frac{1}{2}\frac{{{F}^{2}}\times A\times L}{{{A}^{2}}\times Y}\] \[=\frac{1}{2}\times \frac{{{F}^{2}}L}{AY}\] \[=\frac{1}{2}\frac{{{(50)}^{2}}\times 0.2}{1\times {{10}^{-4}}\times 1\times {{10}^{11}}}\] \[=2.5\times {{10}^{-5}}J\]You need to login to perform this action.
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