A force other than a true force (a force due to interaction with other systems) included in the force term of an equation when the equation of motion of an object in a non-inertial system is written in the same form as Newton's equation of motion in an inertial system. In other words, if the acceleration that an object of mass m experiences when force f is a in an inertial system and a ' in a non-inertial system, then the equation of motion that determines the object's motion is Newton's equation of motion ma = f in an inertial system. However, in a non-inertial system, ma ' = f - ma0 . However, a0 = a - a ', which represents the relative acceleration of the non-inertial system to the inertial system. The term -ma0 , which is proportional to the object's mass m , is an apparent force, and is called by the following names depending on the various cases of relative acceleration a0 . In a translational acceleration system that moves with a translational acceleration a1 relative to an inertial system , a0 = a1 , and the apparent force -ma1 is called the translational inertial force . In a rotating coordinate system that rotates with an angular velocity ω relative to an inertial system, there are three types of apparent forces. In a rotating system with a constant angular velocity ω, there is the centrifugal force acting on objects that are not on the axis of rotation, and the Coriolis force acting only on objects that are moving relative to the rotating system. In a rotating system where the magnitude of the angular velocity ω or the direction of the axis of rotation changes, there is another apparent force called the lateral inertia force. Source: Encyclopaedia Britannica Concise Encyclopedia About Encyclopaedia Britannica Concise Encyclopedia Information |
非慣性系での物体の運動方程式を,慣性系でのニュートンの運動方程式と同形に書いたときに,方程式の力の項に含まれる真の力 (他の系との相互作用による力) 以外の力。すなわち,力 f が働いたときに質量 m の物体が得る加速度が慣性系では a ,非慣性系では a' であるとすれば,物体の運動を決める運動方程式は慣性系ではニュートンの運動方程式 ma=f である。しかし非慣性系では ma'=f-ma0 となる。ただし a0=a-a' で,これは慣性系に対する非慣性系の相対加速度を表わす。物体の質量 m に比例する項 -ma0 が見かけの力であって,相対加速度 a0 の種々の場合に応じて以下の名で呼ばれる。慣性系に対し並進加速度 a1 で動く並進加速度系では a0=a1 であって,見かけの力 -ma1 を並進慣性力という。慣性系に対し角速度 ω で回転する回転座標系では,見かけの力は3種に分類される。角速度 ω が一定な回転系では,回転軸上にない物体に働く遠心力と回転系に対し動いている物体にだけ働くコリオリの力とがある。角速度の大きさ ω または回転軸の方向が変る回転系では,これら以外の見かけの力として横慣性力がある。
出典 ブリタニカ国際大百科事典 小項目事典ブリタニカ国際大百科事典 小項目事典について 情報 |
>>: Customs duty rate - Kanzeiritsu
A type of unsaturated fatty acid with four double...
Aigospotamoi (Aegospotami) means "Goat River....
This is the standard site for the culture of the s...
The name of a koji troupe that was active in Yamat...
…The origin of this legend is as follows: Kakushi...
...A school of Kamigata-mai. Its founder was Sens...
Battles fought on the sea, under the sea, and in t...
A short story by the German author Kafka. Publish...
A bulbous plant of the Amaryllidaceae (APG classi...
In experimental research, the method for determini...
...There are many cultivars with a variety of flo...
An ancient central government office. Under the j...
A general term for meteorites found in the Antarct...
Leaching is not only used as a smelting technique...
〘Noun〙 (meaning "sea of water") A lake...