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# poundal

(pdl or pl)
an English unit of force used in engineering. Since traditional measuring systems, including the English system, did not distinguish between force and mass units, the poundal was defined to provide a unit clearly measuring force rather than mass. One poundal is the force that accelerates a mass of one pound at the rate of one foot per second per second. Since the acceleration of gravity averages about 32.174 ft/sec2 at the Earth's surface, one poundal is about 1/32.174 = 0.031 081 pound of force. One poundal is also equal to approximately 0.138 255 newton, or 13 825.5 dynes. The newton, the SI unit, is now the preferred unit of force in engineering and technical work. The poundal was invented in the 1870s by the British mathematician James Thomson, who also named the radian.

Dictionary of units of measurement. 2015.

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• Poundal — Pound al, n. [From 5th {Pound}.] (Physics & Mech.) A unit of force based upon the pound, foot, and second, being the force which, acting on a pound avoirdupois for one second, causes it to acquire by the of that time a velocity of one foot per… …   The Collaborative International Dictionary of English

• Poundal —   [paʊndl, englisch] das, / s, Einheitenzeichen pdl, Einheit der Kraft in Großbritannien außerhalb des Internationalen Einheitensystems (SI), 1 pdl = 0,138 N …   Universal-Lexikon

• poundal — [poun′dəl] n. [ POUND1 + (QUINT)AL] the basic unit of force in the FPS system, equal to the force which imparts an acceleration of one foot per second per second to a mass of one pound (0.1383 newton or 13,825.5 dynes): abbrev. pdl …   English World dictionary

• Poundal — The poundal is a non SI unit of force. It is a part of the foot pound second system of units, a coherent subsystem of English units introduced in 1879, and one of several specialized subsystems of mechanical units used as aids in calculations. It …   Wikipedia

• Poundal — Das poundal, kurz pdl, ist eine nicht SI konforme Einheit der Kraft. Es ist ein Teil des absoluten foot pound second angloamerikanischen Maßsystems, eines kohärenten Untersystems der englischen Einheiten, das im Jahre 1879 eingeführt wurde. Es… …   Deutsch Wikipedia

• Poundal — Le poundal est une unité anglo saxonne de force, définie comme étant 1 lb ft/s². Elle vaut exactement 1 pdl = 0,138 254 954 376 N. Portail de la physique Catégories : Unité de mécaniqueUnité de me …   Wikipédia en Français

• poundal — noun Etymology: 1pound + al (as in quintal) Date: 1879 a unit of force equal to the force that would give a free mass of one pound an acceleration of one foot per second per second …   New Collegiate Dictionary

• poundal — /pown dl/, n. Physics. the foot pound second unit of force, equal to the force that produces an acceleration of one foot per second per second on a mass of one pound. Abbr.: pdl [1875 80; POUND2 + AL2] * * * …   Universalium

• poundal — noun A unit equal to the force needed to accelerate a mass of one pound at a rate of one foot per second per second …   Wiktionary

• poundal — The force required to give a mass of 1 lb an acceleration of 1 ft/s2; equal to 0.138255 N. * * * pound·al pau̇nd əl n a unit of force equal to the force that would give a free mass of one pound an acceleration of one foot per second per second …   Medical dictionary