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A uniform triangular plate of mass m whose vertices are ABC and has length $l, \frac{l}{2}$ and $\large\frac{l}{\sqrt 2}$. Find the moment of inertia of this plate about an axis passing through the point B and perpendicular to the plane of the plate

\[\begin {array} {1 1} (a)\;\frac{Ml^2}{6} & \quad (b)\;\frac{Ml^2}{3} \\ (c)\;\frac{Ml^2}{12} & \quad  (d)\;\frac{Ml^2}{2 \sqrt 2} \end {array}\]

kindly tell the previous question.Solution is telling direct final answer.

1 Answer

ABC is a symmetric part of a square of side l.
M.I of a square bar of mass $M$ and side $l$ is $\frac{M}{12} (l^2 + l^2) = \frac{2M l^2}{12}$
$\therefore M.I= \large\frac{Ml^2}{6}$
answered Nov 26, 2013 by meena.p
edited Nov 28, 2017 by priyanka.c

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