A solid sphere of mass M, radius R and having moment of inertia about an axis passing through the centre of mass as J, is recast into a disc of thickness t, whose moment of inertia about an axis passing through its edge and perpendicular to its plane remains J. Then, radius of the disc will be - VgyanHub

Question:

11.A solid sphere of mass M, radius R and having moment of inertia about an axis passing through the centre of mass as J, is recast into a disc of thickness t, whose moment of inertia about an axis passing through its edge and perpendicular to its plane remains J. Then, radius of the disc will be

Options :

a) 2R/√15
b) R(√2/15)
c) 4R/√15
d) R/4

Answer :

a) 2R/√15

Answer Steps :

Step1 :-

Step2 :-

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