vis mortua (English spelling) vismortua

Japanese: vis mortua(英語表記)vismortua
vis mortua (English spelling) vismortua

…In this sense, they were just one step away from I. Newton's laws of motion. In response to this, in 1886, G.W. Leibniz, based on the common sense at the time that the force of a moving object must be inherent to the object, proposed that the quantity mv2 represents this "force" and that the sum of this quantity is what is conserved throughout the universe, and called it "vital force vis viva" in contrast to the "dead force vis mortua" that appears in the balance of static mechanics (C. Huygens had also used the quantity mv2 in his treatment of the compound pendulum, but did not particularly emphasize its importance). Leibniz's argument went as follows: …

*Some of the terminology that mentions "vis mortua" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…この意味で彼らはI.ニュートンの運動の法則のまさに一歩手前まで到達していたといってよい。これに対し,86年にG.W.ライプニッツは当時の常識であった〈運動する物体のもつ力は物体に固有のものでなければならぬ〉という考えから,mv2という量こそがこの“ちから”を表し,宇宙全体で保存されるのはこの量の総和であるとし,静力学のつり合いで現れる“死んだ力vis mortua”に対して,これを“活力vis viva”と呼んだ(なお,C.ホイヘンスもこれに先だって複合振子の取扱いでmv2という量を使ったが,とくにその重要性を強調することはしなかった)。ライプニッツの議論は次のようなものであった。…

※「vis mortua」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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