…Couples do not affect the movement of the center of gravity, but only change the rotational motion if the object is rigid. If the magnitude of the force is F and the distance between the lines of action is d , the action of a couple on a rigid body is determined only by the magnitude of Fd and the direction of the plane containing the two forces, so it can be expressed as a vector N with magnitude N = Fd , perpendicular to the plane containing the lines of action of the two forces and with the direction of the couple as the direction in which a right-handed screw advances, and this is called the moment of the couple. For a rigid body, if the couples have the same N , their action is the same regardless of the magnitude of F or d or the position of the point of application. … *Some of the terminology that refers to "couple moment" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…偶力は重心の運動には影響を与えず,物体が剛体の場合には回転運動だけを変化させる。力の大きさをF,作用線間の距離をdとすると,剛体に対する偶力の働きはFdの大きさと2力を含む面の方向だけで決まるので,大きさがN=Fd,2力の作用線を含む面に垂直でかつその偶力で右ねじの進む向きを方向とするベクトルNで表し,これを偶力のモーメントという。剛体では,Nが等しい偶力であればFやdの大きさや作用点の位置にかかわりなくその働きは同じである。… ※「偶力のモーメント」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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