Newton's Second Law 𝐅=𝑚𝐚 is actually only true for the special case where the mass 𝑚 doesn't change with timepic.twitter.com/DcVDNzOdTW
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If I’m remembering correctly, it was the momentum equation at Newton presented in Principia, but he called “momentum” the “quality of motion”. To be fair, he was probably hopped up on Mercury and figs...
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Yes, you are right, and, that’s what I meant to write. I should learn to proveread...
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Proofread*
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