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Can you?

  1. Feb 4, 2008 #1
    To all the engineers or the enginnering students out there. How do you give the definition to one meter (1 m)? More: How much do you weight in Newton, slug, and pound-force (lb_f)?
  2. jcsd
  3. Feb 5, 2008 #2


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    The meter is a base unit in the SI system. It helps to define other units. Although, according to Wiki, the standard used to define a meter is 1⁄299,792,458 th of a light-second.

    In regards to your question about weight, there are 4.448 Newtons in a Lbf. You can do the math from there to convert any other numbers. Be careful, you are including a unit of mass (the slug) in with units of force. They are not interchangeable.
  4. Feb 5, 2008 #3


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    All SI units can be decomposed into Fundamental Units in the SI system.

    Like Fred said, the modern fundamental definition of a meter is 1⁄299,792,458 of a light-second. Historically it was defined as 1/10,000,000 of the distance between the poles of the earth passing through Paris. http://en.wikipedia.org/wiki/Meter

    A newton is a unit of force, which is in turn decomposed into three fundamental units- Kilograms, Seconds, and Meters. A Newton can be decomposed into [tex]\frac{kg*m}{s^2}[/tex], a defintion that utilizes only fundamental SI units. According to Wikipedia:


    A pound-force is a little less obvious because empirical units are not as clean as SI. however, the general definition according to Wiki:


    A slug is a unit of mass that is even harder to visualize, but the basic definition is:

    Last edited: Feb 5, 2008
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