Start Free Mock LoginAlready registered? Login here

Physics - Rotation Question with Solution | TestHub

PhysicsRotationCalculation of M.I.Easy2 minPYQ_2020

PhysicsEasysingle choice

The ratio of radii of gyration of a ring to a disc (both circular) of same radii and mass, about a tangential axis perpendicular to the plane is

Options:

Answer:

Solution:

(C) $I_{Ring} = M R^{2} + M h^{2} = M R^{2} + M R^{2} = 2 M R^{2}$ $I_{Disc} = \frac{1}{2} M R^{2} + M h^{2} = \frac{1}{2} M R^{2} + M R^{2} = \frac{3}{2} M R^{2}$ $∴ k_{ring} = 2 R$ $k_{disc} = \frac{3}{2} R$ $∴ \frac{k _{ring}}{k _{disc}} = \frac{2 R}{3} = \frac{2}{3} R$

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

⏱ 2mℹ️ Source: PYQ_2020

Doubts & Discussion

Loading discussions...