KKmIvRRvmRIif−=+++22202202ωωwhich is clearly positive. Thus, some of the initial kinetic energy is “lost” — that is, transferred to another form. And the culprit is the roach, who must find it difficult to stop (and “internalize” that energy). 50. So that we don’t get confused about ± signs, we write the angular speedto the lazy Susan as ωand reserve the symbol for the angular velocity (which, using a common convention, is negative-valued when the rotation is clockwise). When the roach “stops”we recognize that it comes to rest relative to the lazy Susan (not relative to the ground).
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