I honestly don’t get this. I see these absurd gear reduction videos, 25k:1, Googol:1, etc. The first gear is easy to turn but the last barely turns due to gear reduction. They always show themselves trying to turn the last gear by hand and it doesn’t turn easilly. Why is that the case? why can’t the last gear become the first if you turn it first?
In: Engineering
If you take one of those gazillion:1 gear trains and run the final gear at 1 rpm, you’re now trying to turn the first gear at a gazillion rpm. Even without friction, that’s trying to accelerate something incredibly quickly, which takes a lot of force (and with some of those gear trains you would actually be hitting relativistic speeds so classical physics don’t even work).
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