A circular disc \[{{D}_{1}}\] of mass M and radius R has two identical discs \[{{D}_{2}}\] and \[{{D}_{3}}\]of the same mass M and radius R attached rigidly at its opposite ends (see figure). The moment of inertia of the system about the axis OO, passing through the centre of \[{{D}_{1}}\], as shown in the figure, will be- [JEE Main 11-Jan-2019 Evening] |
A) \[3M{{R}^{2}}\]
B) \[\frac{4}{5}M{{R}^{2}}\]
C) \[\frac{2}{3}M{{R}^{2}}\]
D) \[M{{R}^{2}}\]
Correct Answer: A
Solution :
[a] |
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