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 Originally Posted by OngBonga
The impression I got from that is we know the effect inertia has, but we don't know why it happens. All Newton did was tell us inertia is a measure of mass.
The problem with that complaint is that "What will happen if [...]?" is what physics is good at answering, but "Why does [...] happen?" is really beyond the scope of the field.
Ergo, it's not a fair criticism of one particular field or result of physics to say, "We don't understand why this happens," because there are no statements produced by physics that answer "why" questions.
EDIT: at the bottom, I mean. A student can ask why? and receive answers for years, but eventually those answers run out... because at the bottom, we can only describe and predict, but not explain.
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