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invention (n): the action of inventing something, typically a process or device. device (n): a thing made or adapted for a particular purpose The purpose is d
by 55555 7y ago
invention (n): the action of inventing something, typically a process or device.
device (n): a thing made or adapted for a particular purpose
The purpose is different.
- saagarjha 7y agoSure; I'm arguing that the leap necessary between wheels and gears isn't really all that huge. A gear is basically just a wheel–regardless of whether you think it's a separate invention or not it's not really that impressive as going from nothing to the wheel.
- beambot 7y agoGears provide mechanical advantage -- i.e. gear ratio.
- saagarjha 7y agoSo do two wheels of different sizes.
- jazzyjackson 7y agoA gear is a lever which uses a wheel to apply continuous leverage - I would say using wheels as force multipliers is a considerable jump in cleverness than just using them to roll around