The radius of gyration of a solid sphere of radius about a certain axis is r. The distance of that axis from the centre of the sphere is

The radius of gyration of a solid sphere of radius about a certain axi

1.	The radius of gyration of a solid sphere of radius about a certain axis is r. The distance of that axis from the centre of the sphere is
Answer» `(2)/(5)r` `sqrt((2)/(5))r` `sqrt(0.6)r` `sqrt((5)/(3))r` Solution :From parallel AXIS theorem `I=I_(C)+Md^(2)` `:. mr^(2)=(2)/(5)mr^(2)+Md^(2)` `d= sqrt((3)/(5))r= sqrt(0.6)r`