Cutting is the separation of a physical object, or a portion of a physical object, into two portions, through the application of an acutely directed force. An implement commonly used for cutting is the knife. However, any sufficiently sharp object is capable of cutting if it has a hardness sufficiently larger than the object being cut, and if it is applied with sufficient force. traditional Scandinavian puukko knife A knife is a sharp-edged hand tool used for cutting. ... In materials science, hardness is the characteristic of a solid material expressing its resistance to permanent deformation. ...
Cutting is a compressive and shearing phenomenon, and only occurs when the total stress generated by the cutting implement exceeds the ultimate strength of the material of the object being cut. The simplest applicable equation is stress = force/area: The stress generated by a cutting implement is directly proportional to the force with which it is applied, and inversely proportional to the area of contact. Hence, the smaller the area (i.e., the sharper the cutting implement), the less force is needed to cut something. Compression in material science, physics or structural engineering, is the stress state of materials where the volume tends to decrease (compaction). ... In physics and mechanics, shear refers to a deformation that causes parallel surfaces to slide past one another (as opposed to compression and tension, which cause parallel surfaces to move towards or away from one another). ...
traditional Scandinavian puukko knife A knife is a sharp-edged hand tool used for cutting. ... Firefighter with a fire-axe An axe (also spelt as ax) is a tool with a metal blade that is securely fastened at a 90 degree angle to a handle, usually of wood, while a blade fastened horizontally is called an adze. ... Machete The machete (International Phonetic Alphabet: ) is a cleaver-like tool that looks like a very large bread knife. ... Different types of scissors - sewing, kitchen, paper Scissors are a tool used for cutting thin material which requires little force. ... The article is about the tool. ... ... Occams Razor or Hanlons razor A razor is a an edge tool (primarily, used in shaving). ... Categories: Stub | Knives ...
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