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I was just reading an ELI5 on gear ratios, and it got me thinking about how essential they are too pretty much everything that moves. It breaks down to trading speed for torque, or vice versa, right? Like, a small gear turning a big gear gives you more power to turn something heavy, but it'll turn slower.
What I found engaging was thinking beyond just cars and bikes. Someone in the comments mentioned how the same principles apply to something like a simple can opener. You're applying a small force over a larger distance (turning the handle) to generate a much larger force over a small distance (cutting the can). It's just packaged in a way that's less obvious than looking at a set of gears.
It really highlights how even seemingly complex machines boil down to a few pretty simple physics principles. Are there any less obvious, everyday examples of gear ratios or torque multiplication that blew your mind when you understood them? I'm always looking for more examples to wrap my head around!