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Been thinking a lot about why the idea of using gear ratios to achieve perpetual motion keeps popping up in discussions. Intuitively, it feels like you could arrange a system where one gear's rotation powers another, which in turn powers the first, creating a self-sustaining loop. but the laws of thermodynamics tell us pretty definitively that this isn't possible.What’s interesting is why the illusion persists. Is it a fundamental misunderstanding of friction and energy loss at each stage of the gear train? Or is it something more subtle, like overlooking the energy required to overcome the initial inertia of the system, even if perfectly balanced theoretically? I’ve seen visualizations that seem convincing at first glance, but hidden friction always seems to be the spoiler.
Curious what others think. Are there specific examples or thought experiments that highlight the inherent flaws in perpetual motion machines powered by gear ratios? What's the most common misconception that keeps this idea alive?