Definition:Force/Unit
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Definition
The SI unit of measurement of force is the newton.
The CGS unit of measurement of force is the dyne.
The FPS unit of measurement of force is the poundal.
Newton
The newton is an SI unit of force.
It is defined as being:
- The amount of force required to accelerate a mass of one kilogram at a rate of one metre per second squared.
\(\ds \) | \(\) | \(\ds 1\) | newton | |||||||||||
\(\ds \) | \(=\) | \(\ds 10^5\) | dynes | |||||||||||
\(\ds \) | \(\approx\) | \(\ds 0.1020\) | kilograms force | |||||||||||
\(\ds \) | \(\approx\) | \(\ds 0.2248\) | pounds force | |||||||||||
\(\ds \) | \(\approx\) | \(\ds 7.233\) | poundals |
Dyne
The dyne is the CGS unit of force.
It is defined as being:
- The amount of force required to accelerate a mass of one gram at a rate of one centimetre per second squared.
\(\ds \) | \(\) | \(\ds 1\) | dyne | |||||||||||
\(\ds \) | \(=\) | \(\ds 10^{-5}\) | newtons |
Poundal
The poundal is an FPS unit of force.
It is defined as being:
- The amount of force required to accelerate a mass of one pound at a rate of one foot per second squared.
\(\ds \) | \(\) | \(\ds 1\) | poundal | |||||||||||
\(\ds \) | \(\approx\) | \(\ds 0 \cdotp 13825 \, 5\) | newtons |
Sources
- 1964: Milton Abramowitz and Irene A. Stegun: Handbook of Mathematical Functions ... (previous) ... (next): $2$. Physical Constants and Conversion Factors: Table $2.1$ Common Units and Conversion Factors
- 1966: Isaac Asimov: Understanding Physics ... (previous) ... (next): $\text {I}$: Motion, Sound and Heat: Chapter $3$: The Laws of Motion: Mass