Sean Carroll's Mindscape: Science, Society, Philosophy, Culture, Arts, and Ideas
294 | Addy Pross on Dynamics, Stability, and Life
Sean Carroll
If a ball rolls down the hill one way, it will roll up the hill the other way to exactly the height that it started at originally because of conservation of energy. Of course, no one's really worried about this. We know that in the real world there is friction, there is dissipation, there's air resistance. The ball makes noise and that generates heat and things like that.
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