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A rhinoceros beetle rides the rim of a s...

A rhinoceros beetle rides the rim of a small disk that rotates like a merry-go-round. If the beetle crawls toward the center of the disk, do the following (each relative to the central axis) increase, decrease, or remain the same for the beetle-disk system: (a) rotational inertia, (b) angular momentum, and ( c) angular speed?

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(a) Decreases, (b) same (net = 0, so L is conserved), ( c) increases.
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RESNICK AND HALLIDAY-RIGID BODY DYNAMICS - I-CHECKPOINT
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