1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

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

    FredGarvin

    User Avatar
    Science Advisor

    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

    Mech_Engineer

    User Avatar
    Science Advisor
    Gold Member

    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:

    http://en.wikipedia.org/wiki/Newton

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

    http://en.wikipedia.org/wiki/Pound_force

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

    http://en.wikipedia.org/wiki/Slug_(mass)
     
    Last edited: Feb 5, 2008
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?



Similar Discussions: Can you?
  1. Can you guys help me (Replies: 7)

Loading...