kilogram-meter
Noun: A kilogram-meter is a unit of work (or energy) in the meter-kilogram-second system. It is defined as the work done by a constant force of one kilogram-force when its point of application moves one meter in the direction of the force.
This term is used in physics and engineering contexts to quantify mechanical work or energy. It is a compound unit derived from the kilogram (a unit of force in this context) and the meter (a unit of distance). * Work is calculated as force multiplied by distance. Therefore, one kilogram-meter equals one kilogram-force times one meter.
- In classical mechanics, lifting a one-kilogram mass vertically against Earth's gravity through a height of one meter requires approximately one kilogram-meter of work.
- The old engine was rated to perform 5000 kilogram-meters of work per minute.
- While the joule is the SI unit, some older textbooks still express energy values in kilogram-meters.
- The kilogram-meter is largely obsolete in modern scientific work, having been superseded by the joule (the SI unit of energy). One kilogram-meter is approximately equal to 9.80665 joules.
- It is important to distinguish it from the kilogram metre (or kilogram-meter) as a unit of torque, which is a vector product of force and distance. Context is crucial to determine if the unit refers to work (scalar) or torque (vector).
- kgf·m or kg·m: Common abbreviations for kilogram-meter.
- Joule (J): The SI derived unit of energy. 1 J = 1 N·m ≈ 0.10197 kgf·m.
- Newton-meter (N·m): The SI derived unit for work, energy, and torque. Note its dual use, similar to kilogram-meter.
- Kilogram-force (kgf): The unit of force used in the definition of the kilogram-meter.
- (Technical/Obsolete unit of work): No direct single-word synonym. It can be described as "a unit of work equal to a kilogram-force times a meter."
This term has a single, specific technical meaning related to physics. It is not used in everyday language and does not have idiomatic or phrasal verb forms. Its usage is confined to historical or specialized contexts in mechanics.
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a unit of work equal to the work done by a one kilogram force operating through a distance of one meter