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![]() Chris W wrote: gravity wrote: please read the NIST publications which define the Avoirdupois pound in terms of kilograms. this is not debateable since NIST is *the* authority in the US. The NIST isn't the authority on the laws of physics. One of the most basic of which is F=MA, if you use pounds for mass in that formula you get the wrong answer. Nothing that NIST says will change that. 200 lbs = 6.25 slugs * 32 ft/sec^2. Using pounds, the formula won't work any other way. Bull****. Here are a couple of other ways that work just fine with FFU: 200 lb * 32.2 ft/s² = 6440 pdl 0.52 slinch * 386 in/s² = 200 lbf Be sure to distinguish pounds force (lbf) from pounds (lb), and units of measure should remain unchanged in the plural, without adding any language-specific "s" or whatever. Gene Nygaard |
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