| 单词 | centre of mass |
| 释义 | > as lemmascentre of mass centre of mass n. [compare French centre de masse (1758), post-classical Latin centrum massae (1760 or earlier)] the point representing the mean position of all the mass contained by a body or system of bodies; see also centre of gravity n. 2. ΘΚΠ the world > matter > physics > mechanics > dynamics > statics > [noun] > equal balance of opposing forces > centre of mass or gravity centre of gravity1633 centre1668 centre of inertia1785 centre of balance1797 centre of mass1842 centroid1844 1842 S. Earnshaw Treat. Statics (ed. 2) vi. 67 This point is called the centre of gravity of the body or system: it is sometimes also called the centre of mass. 1879 Philos. Trans. (Royal Soc.) 168 236 These six quantities may be expressed in terms of the three velocity-components of the centre of mass of the two molecules. 1932 Pop. Mech. Sept. 443/1 The center of mass must be so disposed that the side thrust created in turning corners, presses downward on the outside wheels, thus increasing traction. 1976 M. V. Berry Pric. Cosmol. & Gravitation iii. 23 The simplest frame of reference for the location of cosmological events..is a frame at rest relative to our galaxy, or to the centre of mass of the local group of galaxies. 2010 Gettysburg (Pa.) Times 28 July c2/1 In most standing individuals, the center of mass is near the belly button. < as lemmas |
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