Dyne
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- Dynes redirects here. For the president of the University of California system, see Robert C. Dynes.
In physics, the dyne (symbol "dyn") is a unit of force specified in the centimeter-gram-second (cgs) system of units, a predecessor of the modern SI. One dyne is equal to exactly 10-5 newtons. Further, the dyne can be defined as "the force required to accelerate a mass of one gram at a rate of one centimeter per second squared."
Dynes per centimeter is the measurement usually associated with measuring surface tension. For example, the surface tension of distilled water is 72 dyn/cm at 25 °C (77 °F).
| 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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F. f. Greek δυναμις (dunamis) power, force.
