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Re: [csproul] Discussion of Meaning of "Kilonewtons" :
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USnavy
May 27, 2010, 5:45 PM
Views: 4220
Registered: Nov 6, 2007
Posts: 2667
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csproul wrote: patto wrote: curt wrote: And, a "pound force," as used here, is the original and traditional definition of a "pound." The "pound mass" is a mere convenience created much later to allow weights and masses to be used interchangeably here on Earth--where the acceleration due to gravity is pretty much constant. SIGH. You can argue tradition and convenience all you want. 1000 years ago isn't really that relevent when the difference between weight and mass wasn't established. Today. In the modern world. A pound is a unit of mass primarily. A unit of force in the FPS system. Today. In the modern world. A pound force is defined by a pound mass. (which is defined in terms of a kg) Today. In the United States. In US Customary units, a pound is a unit of mass. And yet, if you were to ask 100 people what a pound is (in the US anyway), I bet almost all of them would tell you that a pound is a unit of weight, i.e force and not a unit of mass.
If you have three cards, two yellow, one orange, all flipped upside down and identical on their back side, and you flip one over revealing a yellow card what are the chances that the next one you choose will be orange?
(This post was edited by USnavy on May 27, 2010, 5:46 PM)
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Post edited by USnavy
() on May 27, 2010, 5:46 PM
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