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Slug (mass)
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Everything about Slug Mass totally explained

The slug is an English unit of mass. It is a mass that accelerates by 1 ft/s² when a force of one pound-force (lbf) is exerted on it. Therefore a slug has a mass of about 32.17405 pound-mass or 14.5939 kg. 1 mbox The slug is part of a subset of coherent units known as the gravitational foot-pound-second system (FPS), one of several such specialized systems of mechanical units developed in the late 19th and the 20th century.
   The slug was first used in 1902 by Arthur Mason Worthington (1852–1916) in Dynamics of Rotation (OED), but it didn't see any significant use until decades later. A 1928 textbook says: "No name has yet been given to the unit of mass and, in fact, as we've developed the theory of dynamics no name is necessary. Whenever the mass, m, appears in our formulae, we substitute the ratio of the convenient force-acceleration pair (w/g), and measure the mass in lbs. per ft./sec.² or in grams per cm./sec.²".
   Another name for this unit in early literature is the geepound.
   The unit slinch (derived from the words slug-inch ) is an inch version of the slug. (1 slinch = 1 lbf·s²/in = 12 slugs) The unit blob (bl) is also an inch version of the slug (1 lbf·s²/in).
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