- centre of mass motion
- 质心运动
English-Chinese dictionary of mechanical engineering (英汉机械工程大词典). 2013.
English-Chinese dictionary of mechanical engineering (英汉机械工程大词典). 2013.
motion, equation of — Mathematical formula that describes the motion of a body relative to a given frame of reference, in terms of the position, velocity, or acceleration of the body. In classical mechanics, the basic equation of motion is Newton s second law (see… … Universalium
centre of inertia — noun a) The centre of mass. b) A point, near or within a body, at which the bodys mass can be assumed to be concentrated when considering its rotational motion and moment of inertia. This may be different from its … Wiktionary
centre of gravity — noun /ˌsen.tər əv ˈɡræv.ə.ti/ a) a point, near or within a body, through which its weight can be assumed to act when considering forces on the body and its motion under gravity. This coincides with the centre of mass in a uniform gravitational… … Wiktionary
motion picture — motion picture, adj. 1. a sequence of consecutive pictures of objects photographed in motion by a specially designed camera (motion picture camera) and thrown on a screen by a projector (motion picture projector) in such rapid succession as to… … Universalium
motion picture, history of the — Introduction history of the medium from the 19th century to the present. Early years, 1830–1910 Origins The illusion of motion pictures is based on the optical phenomena known as persistence of vision and the phi phenomenon. The first … Universalium
mass spectrometry — or mass spectroscopy Analytic technique by which chemical substances are identified by sorting gaseous ions by mass using electric and magnetic fields. A mass spectrometer uses electrical means to detect the sorted ions, while a mass spectrograph … Universalium
Motion sickness — For the album by Bright Eyes, see Motion Sickness. Motion sickness Classification and external resources ICD 10 T75.3 ICD 9 … Wikipedia
Motion Pictures — ▪ 1995 Introduction Selected Film Awards 1994(For Selected Film Awards, see Table (Selected Film Awards 1994).) The overall picture of world cinema in 1994, on the eve of the 100th anniversary of motion pictures, was one of national… … Universalium
Retrograde motion — This article is about retrograde motions of celestial bodies relative to a gravitationally central object. For the apparent motion as seen from a particular vantage point, see Apparent retrograde motion. Retrograde orbit: the satellite (red)… … Wikipedia
Kepler's laws of planetary motion — In astronomy, Kepler s Laws of Planetary Motion are three mathematical laws that describe the motion of planets in the Solar System. German mathematician and astronomer Johannes Kepler (1571–1630) discovered them.Kepler studied the observations… … Wikipedia
Proper motion — The proper motion of a star is its angular change in position over time as seen from the center of mass of the solar system.[1] It is measured in seconds of arc per year, arcsec/yr, where 3600 arcseconds equal one degree.[2] This contrasts with… … Wikipedia