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Physics - Rotation Question with Solution | TestHub

PhysicsRotationCalculation of M.I.Medium2 minPYQ_2013

PhysicsMediumsingle choice

Four small objects each of mass $m$ are fixed at the corners of a rectangular wire-frame of negligible mass and of sides $a$ and $b (a > b)$ If the wire frame is now roated about an axig passing along the side of length $b,$ then the moment of inertia of the system for this axis of rotation is

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Solution:

The given situation can be shown asMoment of inertia of the system about side of length $b$ say $C D$ is $= M . I .$ of mass at $A$ about $C D + M . I .$ of mass at $B$ mass ot $D$ about $C D$ $= m (a)^{2} + m (a)^{2} + m (0)^{2} + m (0)^{2} = 2 m a^{2}$

Stream:WBJEESubject:PhysicsTopic:RotationSubtopic:Calculation of M.I.

⏱ 2mℹ️ Source: PYQ_2013

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