翻訳と辞書 Words near each other ・ Variations on a Dream ・ Variations on a Korean Folk Song ・ Variations on A Love Supreme ・ Variations on a Nursery Tune (Dohnányi) ・ Variations on a Rococo Theme ・ Variations on a Theme ・ Variations on a Theme (David Thomas album) ・ Variations on a Theme (Om album) ・ Variations on a Theme by Haydn ・ Variations on a Theme by Tchaikovsky (Arensky) ・ Variable-length array ・ Variable-length buffer ・ Variable-length code ・ Variable-length intake manifold ・ Variable-length quantity ・ Variable-mass system ・ Variable-message sign ・ Variable-order Bayesian network ・ Variable-order Markov model ・ Variable-pitch propeller ・ Variable-position horizontal stabilizer ・ Variable-range hopping ・ Variable-Rate Multimode Wideband ・ Variable-speed air compressor ・ Variable-sweep wing ・ Variable-width encoding ・ Variables sampling plan ・ Variably Modified Permutation Composition ・ Variably protease-sensitive prionopathy ・ Variaciones Espectrales Dictionary Lists mini英和辞書 mini和英辞書 Webster 1913 Latin-English FOLDOC Wikipedia English ウィキペディア

翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Variable-mass system ： ウィキペディア英語版 Variable-mass system In mechanics, a variable-mass system is a collection of matter whose mass varies with time. It can be confusing to try to apply Newton's second law of motion directly to such a system. Instead, the time dependence of the mass ''m'' can be calculated by rearranging Newton's second law and adding a term to account for the momentum carried by mass entering or leaving the system. The general equation of variable-mass motion is written as :$\backslash mathbf\_\_\; m\}\; =\; m\; t\}$ where Fext is the net external force on the body, vrel is the relative velocity of the escaping or incoming mass with respect to the center of mass of the body, and v is the velocity of the body. In astrodynamics, which deals with the mechanics of rockets, the term ''v''rel is often called the effective exhaust velocity and denoted ''v''''e''. == Derivation == There are different derivations for the variable-mass system motion equation, depending on whether the mass is entering or leaving a body (in other words, whether the moving body's mass is increasing or decreasing, respectively). To simplify calculations, all bodies are considered as particles. It is also assumed that the mass is unable to apply external forces on the body outside of accretion/ablation events. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Variable-mass system」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.