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@sbagley @drspoulsen Oh yeah I guess that's the exception to my other tweet: most models are just a sum of stuff that adds to zero, so you might have extra stuff that's described directly in terms of t instead of the quantity you're modeling.On twitter.com
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@sbagley @drspoulsen E.g. model a falling object under air resistance. But oh yeah after ten seconds the object has rockets that turn on and apply a linearly growing upward force lol.Permalink On twitter.com
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@sbagley @drspoulsen I guess I mostly avoid those because they feel like a stretch, conveniently placed at the section of the textbook that allows you to deal with them.Permalink On twitter.com