poundal
Definition
- Noun:
- A unit of force: A poundal is a unit of force in the foot-pound-second (FPS) system. It is defined as the force required to accelerate a mass of one pound at a rate of one foot per second per second.
Usage
- The poundal is used in physics and engineering contexts, primarily within the FPS system of units, to measure force.
- It is a smaller unit of force compared to the more commonly used pound-force (lbf).
Examples
- Noun:
- The textbook defined the poundal as the force needed to give a one-pound mass an acceleration of one foot per second squared.
- In the FPS system, force can be expressed in poundals.
Advanced Usage
- Technical Context: The poundal is a coherent derived unit in the absolute FPS system, where the pound is used as a unit of mass. This contrasts with the gravitational FPS system, where the pound is often used as a unit of force (pound-force).
- Dimensional Analysis: One poundal is dimensionally equivalent to .
Variants and Related Words
- Pound-force (lbf): A related but distinct unit of force in the gravitational FPS system, defined as the force exerted by gravity on a one-pound mass. One pound-force is approximately equal to 32.174 poundals.
Synonyms
- Unit of force: This is a general synonym, as the poundal is a specific type of force unit.
Related Phrases
- Foot-pound-second system (FPS): The system of measurement in which the poundal is defined.
- Newton (N): The SI unit of force. One poundal is equal to approximately 0.138255 newtons.
Noun
-
a unit of force equal to the force that imparts an acceleration of 1 foot/sec/sec to a mass of 1 pound; equal to 0.1382 newtons
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