Planetary Interiors: General Principles
Moment
of Inertia
- Moment of Inertia: The moment of inertia is a measure of the
degree to which mass is concentrated toward an object's center.
- Recall that the kinetic
energy (KE) is given by:

- For an object in circular
motion,

where r
is the distance from the rotation axis
where is rotation
frequency in radians/sec

where I
is defined to be the Moment of Inertia, which is given by:

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