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Libra-fuerza

La libra-fuerza (símbolos: lbf,[1]​ o lbf[2]​) es una unidad física de fuerza. Una libra-fuerza es la fuerza gravitacional ejercida sobre una masa de una libra en la superficie de la Tierra.

Equivalencia con otras unidades de fuerza

La libra avoirdupois internacional es exactamente lbm = 0,453 592 37 kg.[3][4]​ Y la aceleración estándar de la gravedad de la Tierra es gn = 9,806 65 m/s² (32,174 05 ft/s²) por convenio. Relacionándolas con la segunda ley de Newton para una masa constante, se puede convertir la libra-fuerza a newton del Sistema Internacional de Unidades:

lbf = lbmgn = 4,448 221 615 260 5 N ≈ 4,448 222 N

Referencias

  1. IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units), IEEE Std 260.1™-2004 (Revision of IEEE Std 260.1-1993)
  2. Fletcher, Leroy S.; Shoup, Terry E. (1978), Introduction to Engineering, Prentice-Hall, ISBN 978-0135018583, LCCN 77024142, archivado desde el original el 6 de diciembre de 2019, consultado el 3 de agosto de 2017. .: 257 
  3. BS 350 : Part 1: 1974 Conversion factors and tables, Part 1. Basis of tables. Conversion factors. British Standards Institution. 1974. p. 43. 
  4. Barry N. Taylor, Guide for the Use of the International System of Units (SI), 1995, NIST Special Publication 811, Appendix B note 24
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Libra-fuerza
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