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narf poit chez BOOM said:
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It would take more energy for it to spin slower, and more mass for it to spin faster.
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...Did I miss some basic physics here? Last time I checked, heavier things need more energy to move, and more energy makes things go faster.
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Mass and energy convert between one or the other. The thing with gravity is, you need mass not energy.
Since I believe the spin of a body in space is naturally dependent on mass, by adding mass the spin would increase. By adding energy (which cancels out mass) spin would decrease.