Like what difference does the cutting motion do compared to just pushing down a knife ?
In: Physics
Not ELI5 but reason is:
* The pushing down motion only relatively compresses the item you’re knifing
* The cutting/slicing motion causes greater shear deformation in the item you’re cutting, acting to turn the small microscopic cubes underneath the knife edge into parallelepiped (3d parallellogram) shaped objects
* Shear deformation has been mathematically shown to produce 1.73x the distortion energy compared to pure compressive deformation, based on theories by von Mises.
* High distortion energy leads to a breaking of the material’s intermolecular bonds.
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