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- Thread starter ThienAn
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FredGarvin

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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.

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Mech_Engineer

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All SI units can be decomposed into http://en.wikipedia.org/wiki/SI_base_unit" [Broken] 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:

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/NewtonWikipedia.org said:The newton is the amount of force that is required to accelerate a kilogram of mass at a rate of one meter per second squared.

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_forceWikipedia.org said:One pound-force is approximately equal to the gravitational force exerted on a mass of one avoirdupois pound on the surface of Earth.

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)Wikipedia.org said: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

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