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Physics - Rotation Question with Solution | TestHub

PhysicsRotationCalculation of M.I.Medium2 minPYQ_2023

PhysicsMediumsingle choice

A square lamina of side ' $b$ ' has same mass as a disc of radius ' $R$ ' the moment of inertia of the two objects about an axis perpendicular to the plane and passing through the centre is equal. The ratio $\frac{b}{R}$ is

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Answer:

Solution:

$I_{lamina} = \frac{Mb ^{2}}{6} I_{disc} = \frac{MR ^{2}}{2} Given \frac{Mb ^{2}}{6} = \frac{MR ^{2}}{2} \frac{b ^{2}}{R ^{2}} = 3 ∴ \frac{b}{R} = \frac{3}{1}$

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

⏱ 2mℹ️ Source: PYQ_2023

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