1 Answers
Subhomoy Bakshi
·2010-05-10 07:43:57
I for a solid sphere is 2Mr2/5
so I of each sphere abt its COM = 2/5* M *(R/2)2=MR2/10..
now applying parallel axis theorem..I for left wala sphere=MR2/10+ M(2R)2
total I=MR2/10+M(2R)2 + MR2/10=21MR2/5
hence option C...verify...