| 单词 | pound-force |
| 释义 | > as lemmaspound-force pound-force n. (plural pounds-force) a unit of force equal to the weight of a mass of one pound avoirdupois, esp. under standard gravity (when it is equivalent to approx. 4.45 newtons); abbreviated lbf. ΘΚΠ the world > matter > physics > mechanics > force > [noun] > units of force pound-weight1824 pound-force1865 gram weight1871 dyne1873 kilodyne1873 poundal1875 Gramme1884 Newton1904 kilogram force1905 gram force1909 kip1915 N1951 lbf1961 ounce-force1961 ton-force1961 1865 N. Arnott Elements Physics (ed. 6) 104 If the weight rise half an inch only, while the handle of the winch describes a circle of fifty inches, one pound force at the winch would balance one hundred pounds at d. 1949 W. Ernst Oil Hydraul. Power i. 2 The pound force imparts 32·174 feet per sec2 to the pound mass. 1977 Daily Tel. 16 Dec. 2/3 As Britain moves towards complete metrication motorists will have to get used to checking their car tyre pressures in atmospheric bars instead of pounds force per square inch. < as lemmas |
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