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29 July, 11:05

Where did the rotational kinetic energy of the earth come from?

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  1. 29 July, 13:39
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    The solar system formed from a massive cloud of gas and dust, which was slowly rotating. As the cloud collapsed under its own gravitational pull, the cloud started to spin faster, just as an ice skater pulling his arms in will spin faster. Because all of the material that accreted to form the planet was rotating, the planet was rotating as well.
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