 centrifugal force

an outward force on a body rotating about an axis, assumed equal and opposite to the centripetal force and postulated to account for the phenomena seen by an observer in the rotating body.[171525]
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Fictitious force, peculiar to circular motion, that is equal but opposite to the centripetal force that keeps a particle on a circular path (see centripetal acceleration).For example, a stone attached to a string and whirling in a horizontal circular path is accelerated toward the centre of its path by the tension in the string, the only force acting on the string. However, in a reference frame at rest with the stone, another forcethe centrifugal forcemust be introduced for Newton's laws of motion to apply. Centrifugal force is a useful concept in analyzing behaviour in rotating systems.* * *
▪ physicsa fictitious force, peculiar to a particle moving on a circular path, that has the same magnitude and dimensions as the force that keeps the particle on its circular path (the centripetal force) but points in the opposite direction.A stone whirling in a horizontal plane on the end of a string tied to a post on the ground is continuously changing the direction of its velocity and, therefore, has an acceleration toward the post. This acceleration is equal to the square of its velocity divided by the length of the string. According to Newton's second law, an acceleration is caused by a force, which in this case is the tension in the string. If the stone is moving at a constant speed and gravity is neglected, the inwardpointing string tension is the only force acting on the stone. If the string breaks, the stone, because of inertia, will keep on going in a straight line tangent to its previous circular path; it does not move in the outward direction as it would if the centrifugal force were real.Although it is not a real force according to Newton's laws (Newton's laws of motion), the centrifugalforce concept is a useful one. For example, when analyzing the behaviour of the fluid in a cream separator or a centrifuge, it is convenient to study the fluid's behaviour relative to the rotating container rather than relative to the Earth; and, in order that Newton's laws be applicable in such a rotating frame of reference, an inertial force, or a fictitious force (the centrifugal force), equal and opposite to the centripetal force, must be included in the equations of motion. In a frame of reference attached to the whirling stone, the stone is at rest; to obtain a balanced force system, the outwardacting centrifugal force must be included.Centrifugal force can be increased by increasing either (1) the speed of rotation, (2) the mass of the body, or (3) the radius, which is the distance of the body from the centre of the curve. Increasing either the mass or the radius increases the centrifugal force proportionally, but increasing the speed of rotation increases it in proportion to the square of the speed; that is, an increase in speed of 10 times, say from 10 to 100 revolutions per minute, increases the centrifugal force by a factor of 100. Centrifugal force is expressed as a multiple of g, the symbol for normal gravitational force (strictly speaking, the acceleration due to gravity). Centrifugal fields of more than 1,000,000,000 g have been produced in the laboratory by devices called centrifuges.* * *
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Centrifugal force — Centrifugal Cen*trif u*gal, a. [L. centrum center + fugere to flee.] 1. Tending, or causing, to recede from the center. [1913 Webster] 2. (Bot.) (a) Expanding first at the summit, and later at the base, as a flower cluster. (b) Having the radicle … The Collaborative International Dictionary of English
Centrifugal force — Force Force, n. [F. force, LL. forcia, fortia, fr. L. fortis strong. See {Fort}, n.] 1. Capacity of exercising an influence or producing an effect; strength or energy of body or mind; active power; vigor; might; often, an unusual degree of… … The Collaborative International Dictionary of English
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centrifugal force — n. an inertial force which tends to pull an object outward when it is in orbit or is rotating around a center … English World dictionary
Centrifugal force — Not to be confused with Centripetal force. Classical mechanics Newton s Second Law … Wikipedia
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centrifugal force — [[t]sentrɪ̱fjʊg(ə)l fɔ͟ː(r)s[/t]] N UNCOUNT In physics, centrifugal force is the force that makes objects move outwards when they are spinning around something or travelling in a curve. The juice is extracted by centrifugal force … English dictionary
centrifugal force — noun the outward force on a body moving in a curved path around another body • Ant: ↑centripetal force • Hypernyms: ↑force * * * noun, pl ⋯ forces [count, noncount] physics : a force that causes an object moving in a circular path to move out and … Useful english dictionary
centrifugal force — noun a) in everyday understanding, centrifugal force is the effect that tends to move an object away from the center of a circle it is rotating about (a consequence of inertia). b) In a rotating reference frame, the apparent force that seems to… … Wiktionary
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