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Physics - Rotation Question with Solution | TestHub

PhysicsRotationCalculation of M.I.Easy2 minPYQ_2021

PhysicsEasysingle choice

The ratio of radii of gyration of a circular ring and circular disc of the same mass and radius, about an axis passing through their centres and perpendicular to their planes is

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Answer:

Solution:

$I = MK^{2}$ For a ring, $MR^{2} = MK_{r}^{2} ∴ K_{r} = R$ For a disc, $\frac{MR ^{2}}{2} = MK_{d}^{2} ∴ K_{d} = \frac{R}{2}$ $\frac{K _{r}}{K _{d}} = 2$

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

⏱ 2mℹ️ Source: PYQ_2021

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