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Physics - Rotation Question with Solution | TestHub

PhysicsRotationCalculation of M.I.Medium2 minPYQ_2023

PhysicsMediumsingle choice

Radius of gyration of a thin uniform circular disc about the axis passing through its centre and perpendicular to its plane is $K_{c}$ . Radius of gyration of the same disc about a diameter of the disc is $K_{d}$ . The ratio $K_{c} : K_{d}$ is

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Solution:

Let the radius of the disc be $R$ $∴ ∴ K_{c} = \frac{R}{2} K_{d} = \frac{R}{2}$ Taking the ratio, $∴ \frac{K _{c}}{K _{d}} = \frac{\frac{R}{2}}{\frac{R}{2}} = \frac{2}{1}$

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

⏱ 2mℹ️ Source: PYQ_2023

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