A solid sphere of mass M and radius R is divided into two unequal parts. The first part has a mass of \(\frac{{7{\rm{M}}}}{8}\) and is converted into a uniform disc of radius 2R. The second part is converted into a uniform solid sphere. Let I1 be the moment of inertia of the new sphere about its axis. The ratio \(\frac{{{{\rm{I}}_1}}}{{{{\rm{I}}_2}}}\) is given by:

A solid sphere of mass M and radius R is divided into two unequal part

1.	A solid sphere of mass M and radius R is divided into two unequal parts. The first part has a mass of \(\frac{{7{\rm{M}}}}{8}\) and is converted into a uniform disc of radius 2R. The second part is converted into a uniform solid sphere. Let I1 be the moment of inertia of the new sphere about its axis. The ratio \(\frac{{{{\rm{I}}_1}}}{{{{\rm{I}}_2}}}\) is given by:
A.	185
B.	140
C.	285
D.	65
Answer» C. 285

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