Question

As shown in diagram there are five identical rods. Length of each rod is $\ell$ and mass $m$. Find out distance of C.O.M. of system From $(C)$

• A. $\ell \sqrt{\frac{109}{50}}$
• B. $\ell \sqrt{\frac{190}{50}}$
• C. $\ell \sqrt{\frac{190}{100}}$
• D. $\ell \sqrt{\frac{109}{100}}$

Answer 1

Answer: (D)

$C D=\sqrt{\ell^{2}+\left(\frac{3 \ell}{10}\right)^{2}} $
$=\ell \sqrt{\frac{109}{100}}$