Cutting

For other uses, see Cutting (disambiguation)}}}.

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 or in medical cases the scalpel. 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.

Cutting is a compressive and shearing phenomenon, and occurs only 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.

Cutting is also a slang term for the act of self mutilation.

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Cutting tools

Axe
Drill bit
Front teeth
Knife
Machete
Milling cutter
Razor blade
Saw
Chainsaw
Scalpel
Scissors
Tool bits, turning tools for lathes
Blade
Fingernails
Paper (paper cuts)
Switchblade

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