IGSN71 Gravity Value - IGSN71 Gravity Value

Japanese: IGSN71系重力値 - あいじーえすえぬなないちけいじゅうりょくち
IGSN71 Gravity Value - IGSN71 Gravity Value

...In cosmology, the word gravity can refer to the force of gravity, but when it is applied to the Earth, it refers to the combined force of the Earth's gravitational force acting on objects on the Earth and the centrifugal force due to the Earth's rotation (Figure). We feel this gravity as the weight of the object. When discussing the motion of objects that are unrelated to the Earth's rotation, such as artificial satellites, the centrifugal force component is excluded. The strength of gravity acting on a 1 kg object on Earth is approximately 9.8 N and is almost constant. Therefore, gravity is important as a standard force in physics.

*Some of the terminology used in reference to "IGSN71 gravity value" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…重力という語は宇宙論などでは万有引力のことをさすこともあるが,地球についていう場合には地球上の物体にはたらく地球の万有引力と地球自転による遠心力との合力をさす(図)。われわれにはこの重力は物体の重量として感じられる。人工衛星のように地球の自転とは無関係な物体の運動を論ずる場合には遠心力の成分は除いて取り扱う。 地球上で1kgの物体に作用する重力の強さは約9.8Nでほとんど一定である。したがって重力は物理学における力の基準として重要である。…

※「IGSN71系重力値」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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