A solid sphere is rotating about an axis passing through its center of mass with angular velocity #omega#. The sphere itself is in a circular motion about the axis PQ with an angular velocity #omega'#. Calculate its moment of inertia about PQ?

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Answer 1 · 2018-03-23T16:17:05

See below.

The inertia moment does not depend on movement. In this case apply the parallel axis theorem

#I = I_(com)+m d^2#

with #I_(com) = 2/5 m r^2# and #d# the distance between #PQ# and #P'Q'#