Rotational Motion Question 205

Question: A rod of mass m and length $l$ is bent in to mil shape of Z. Its moment of inertia about the axis :

Options:

A)$\frac{ml^{2}}{6}$

B) $\frac{ml^{2}}{3}$

C) $\frac{ml^{2}}{2}$

D) None

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Answer:

Correct Answer: A

Solution:

[a]

$I=\frac{\frac{m}{2}{{\left( \frac{\ell }{2} \right)}^{2}}}{3}+\frac{m}{2}{{\left( \frac{\ell }{2} \right)}^{2}}=\frac{m{{\ell }^{2}}}{6}$



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