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  • A rod of length floats partly immersed in water, being supported by a string fastened to one of

A rod of length \mathrm{2 L} floats partly immersed in water, being supported by a string fastened to one of its ends, as shown in figure. The specific gravity of the rod is 0.75 . The length of rod that is outside water is :

Option: 1

L


Option: 2

L/2


Option: 3

L/3


Option: 4

L/4


Answers (1)

best_answer

\mathrm{\mathrm{I} \rightarrow length \, \, outside, 2 \mathrm{~L}-\mathrm{I}} inside

\mathrm{ \begin{aligned} & {[2 \mathrm{~L}-\mathrm{I}] \mathrm{A} \rho w g+\mathrm{T}=2 \mathrm{LA} \rho_{\mathrm{r}} \mathrm{g}} \\ & {[2 \mathrm{~L}-\mathrm{I}] \mathrm{A} \rho w \mathrm{w} \times\left[\mathrm{I}+\frac{2 \mathrm{~L}-\mathrm{I}}{2}\right]=\left[2 \mathrm{LA} \rho_{\mathrm{r}}\right] \mathrm{g} \mid} \end{aligned} }

Posted by

Rakesh

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