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Search options not deleted user 277312

A tag for questions about the mechanical interactions of rotating objects, including torque and angular momentum.

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Can a galaxy's rotational energy account for dark matter?

I have heard that a wound clock weighs more than an unwound clock, because the energy stored in the winding gives the clock more mass: $E=mc^2$. ChatGPT calculates that the rotational energy of a gala …
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