Homework Answers
moment of inertia of each sphere about its own axis = 0.4mR2
here about the axis of rotation, total moment of inertia = 3 x 0.4mR2 + 6 x (0.4mR2 + m(2R)2)
= 1.2mR2 + 26.4mR2
= 27.6 x 0.435 x 112 kgcm2
= 1452.726 kgcm2
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