Encyclopedic Dictionary of Polymers

2011 Edition
| Editors: Jan W. Gooch


  • Jan W. Gooch
Reference work entry
DOI: https://doi.org/10.1007/978-1-4419-6247-8_12766

\wāt\ n [ME wight, weght, fr. OE wiht; akin to ON wœtt weight, OE wegan to weight] (before 12c) The force with which a body on or near the earth's surface is attracted to the earth, equal to the body's mass × g/gc, where g is the acceleration due to gravity and 1/gc is the proportionality constant in Newton's second law of motion (the law of momentum change). In the SI system, gc = 1.00000 kg·m/(N·s2) while g varies slightly (at sea level) from 9.78039 m/s2 at 0° latitude to 9.83217 m/s2 at 90° latitude because of the earth's spin and consequent flattening at the poles, with its “standard value”, at about 45° N latitude, being 9.80655 m2/s. Thus the abhorred kgf is equated to 9.80655 N. See also  Force. (Giambattista A, Richardson R, Richardson RC, Richardson B (2003) college Physics. McGraw Hill Science, New York)

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© Springer Science+Business Media, LLC 2011

Authors and Affiliations

  • Jan W. Gooch
    • 1
  1. 1.AtlantaUSA