In the meter-kilogram-second system, the unit of force required to accelerate a mass of one kilogram one meter per second per second, equal to 100,000 dynes.
[After Sir Isaac NEWTON.]
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In the meter-kilogram-second system, the unit of force required to accelerate a mass of one kilogram one meter per second per second, equal to 100,000 dynes.
[After Sir Isaac NEWTON.]
[Etymology: I. Newton; England 1642-1727] force. Symbol N. SI, Metric-m.k.s. Identically kg·m·s-2, i.e. the force that gives to a mass of 1 kilogram an acceleration of 1 metre per second, per second (= m·kg·s-2 in base terms). The following are among the coherent derived units:
• N·m for moment of force;
• N·m = joule for energy, work, quantity of heat;
• N·m·s-1 = watt for power, radiant flux;
• N·s·m-2 for dynamic viscosity;
• N·m-1 for surface tension;
• N·m-2 = pascal for pressure.
The name was advocated in 1935
[Hartshorn L., Vigoureux P. Nature Vol. 136, 397 (1935)] and soon became accepted generally.
| 1946 | CIPM ‘Unit of force. - The unit of force [in the MKS (Metre, Kilogram, Second) system] is the force which gives to a mass of 1 kilogram an acceleration of 1 metre per second, per second.’see note below |
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The SI unit of force. One newton is equal to the force required to give a mass of 1 kg an acceleration of 1 ms−2. One newton force is equal to 0.225 lb force, or 1 lb equals 4.48 N.
The SI unit of force; the force that, when acting continuously upon a mass of 1 kilogram, will impart to it an acceleration of 1 meter per second squared. Symbol N.
The newton (symbol: N) is the SI derived unit of force, named after Sir Isaac Newton in recognition of his work on classical mechanics.
A newton is the amount of force required to accelerate a body with a mass of one kilogram at a rate of one meter per second squared. Algebraically:

| Newton (SI unit) |
Dyne | Kilogram-force (Kilopond) |
Pound-force | Poundal | |
|---|---|---|---|---|---|
| 1 N | ≡ 1 kg·m/s² | = 105 dyn | ≈ 0.10197 kp | ≈ 0.22481 lbf | ≈ 7.2330 pdl |
| 1 dyn | = 10−5 N | ≡ 1 g·cm/s² | ≈ 1.0197×10−6 kp | ≈ 2.2481×10−6 lbf | ≈ 7.2330×10−5 pdl |
| 1 kp | = 9.80665 N | = 980665 dyn | ≡ gn·(1 kg) | ≈ 2.2046 lbf | ≈ 70.932 pdl |
| 1 lbf | ≈ 4.448222 N | ≈ 444822 dyn | ≈ 0.45359 kp | ≡ gn·(1 lb) | ≈ 32.174 pdl |
| 1 pdl | ≈ 0.138255 N | ≈ 13825 dyn | ≈ 0.014098 kp | ≈ 0.031081 lbf | ≡ 1 lb·ft/s² |
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The value of gn as used in the official definition of the kilogram-force is used
here for all gravitational units.
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| This SI unit is named after Isaac Newton. As for all SI
units whose names are derived from the proper name of a person, the first letter of its symbol is
uppercase (N). But when an SI unit is spelled out, it should always be written in
lowercase (newton), unless it begins a sentence or is the name "degree
Celsius".
— Based on The International System of Units, section 5.2.
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