stackyFACTSThe humble aluminum can opening is a masterclass in exploiting basic physics to tear metal smoothly.
The humble aluminum can opening is a masterclass in exploiting basic physics to tear metal smoothly. The opening on the lid isn't fully cut; it's heavily scored to remain airtight. When you lift the ring, it acts as a class-two lever, building immense force on the rivet. As it snaps the metal seal, it instantly transitions into a class-one lever, driving the sharp tab down into the liquid without slicing your thumb off.
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