Cutting is the separation of a physical object, or a portion of a physical object, into two or more portions, through the application of an acutely directed force. Implements commonly used for cutting are the knife and saw, or in medicine and science the scalpel and microtome. 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. Even liquids can be used to cut things when applied with sufficient force (see water jet cutter).
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.
Read more about Cutting: Tools Commonly Used For Cutting
Famous quotes containing the word cutting:
“should some limb of the devil
Destroy the view by cutting down an ash
That shades the road, or setting up a cottage
Planned in a government office, shorten his life,
Manacle his soul upon the Red Sea bottom.”
—William Butler Yeats (1865–1939)
“Post-modernism has cut off the present from all futures. The daily media add to this by cutting off the past. Which means that critical opinion is often orphaned in the present.”
—John Berger (b. 1926)
“The sole work and deed of universal freedom is therefore death, a death too which has no inner significance or filling, for what is negated is the empty point of the absolutely free self. It is thus the coldest and meanest of all deaths, with no more significance than cutting off a head of cabbage or swallowing a mouthful of water.”
—Georg Wilhelm Friedrich Hegel (1770–1831)