用牛顿力学原理分析了跳伞降落、跳伞塔跳伞和高空跳伞的问题。
The problems of a parachute jump, parachuting from tower and from a great height are analyzed by Newton's mechanical principles.
牛顿的研究成果在1687年首次出版的《自然哲学的数学原理》一书中发表。 在这本书里牛顿对以前科学家所关心的大部分力学难题做出了解答。
The outcome was the famous "Principia Mathematica", first published in 1687, in which Newton presented solutions to most of the problems of motion that had concerned earlier scientists.
由相对论原理可知，牛顿运动第二定律尽管是古典力学中的基本原理，但只是近似的，而绝不是完全正确的。
It follows from the principle of relativity that Newton's second law of motion, although fundamental in classical mechanics, only has an approximate and by no means complete validity.
由相对论原理可知，牛顿运动第二定律尽管是古典力学中的基本原理，但只是近似的，而决不是完全正确的。
It follows from the principle of relativity that Newton's second law of motion although fundamental in classical mechanics only has an approximate and by no means complete validity.
对等效原理与牛顿力学的定律的不同看法，以及这两种原理的联系。
Summary: the different viewpoint of the laws of the on an equal footing effect principle and Newton's mechanics, and the contact of these two kinds of principles.
艾萨克·牛顿爵士以他非比寻常的观察力和思考力提出的力学定律和原理。
Explore the famous laws and principles that Sir Isaac Newton developed and derived by his unparralleled power of observation and his mechanical thought process.
提出非完整力学的广义达朗贝尔-拉格朗日原理，包括其牛顿表述和拉格朗日表述。此原理能导出态空间封闭的运动方程组。
Generalized DAlembert-Lagranges principle for non-holonomic mechanics, including its Newtons formulation and Lagrangian formulation, are given. This principle can lead to the closed motion equations.
利用牛顿力学、水力学、运动学原理，计算出泵吸入口以上泡沫流体平均密度和流压，并应用于实际生产及二流量试井，取得了好的效果。
Both the average density of bubble fluid above the pump intake and flowing pressure can be obtained using the theory of Newton mechanics, hydraulics and kinematics. The method ha...
利用牛顿力学、水力学、运动学原理，计算出泵吸入口以上泡沫流体平均密度和流压，并应用于实际生产及二流量试井，取得了好的效果。
Both the average density of bubble fluid above the pump intake and flowing pressure can be obtained using the theory of Newton mechanics, hydraulics and kinematics. The method ha...
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