A) \[\frac{mg{{\ell }_{0}}}{4}\]
B) \[\frac{mg{{\ell }_{0}}}{8}\]
C) \[\frac{mg{{\ell }_{0}}}{16}\]
D) None of these
Correct Answer: B
Solution :
In such case elongation in string \[=\text{ }\frac{{{\ell }_{0}}}{4}\,\,=\,\,x\] and \[kx\text{ }=\text{ }mg\] energy store \[u\,\,=\text{ }\frac{1}{2}k{{x}^{2}}\] \[=\,\,\frac{1}{2}\frac{mg}{x}{{x}^{2}}\] \[=\,\,\,\frac{mgx}{2}\] \[=\,\,\,\frac{mg{{\ell }_{0}}}{8}\]You need to login to perform this action.
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