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In physics, a foot-pound force (symbol ft·lbf or ft·lbf), usually abbreviated to foot-pound, is an Imperial and U.S. customary unit of mechanical work, or energy, although in scientific fields one commonly uses the equivalent metric unit of the joule (J). There are approximately 1.356 J/ft·lbf, or exactly 1.355 817 948 331 400 4 J/ft·lbf. It is also called a dynam. Since antiquity, people have tried to understand the behavior of matter: why unsupported objects drop to the ground, why different materials have different properties, and so forth. ...
This article is about post-1824 Imperial units, please see also English unit, U.S. customary unit or Avoirdupois. ...
The U.S. customary units (more commonly known in the US as English units or standard units) are the non-metric units of measurement that are presently used in the United States, in some cases alongside the metric system of units. ...
Work (abbreviated W) is the energy transferred by a force to a moving object. ...
The International System of Units (abbreviated SI from the French language name Système International dUnités) is the most widely used system of units. ...
The joule (symbol: J) is the SI unit of energy, or work. ...
Unit of work or energy
To calculate a foot-pound, you can use this formula, - W = F × D
where W is work (in foot-pounds), F is force (in pounds), and D is distance (in feet) over which the force is applied (measured in the direction of the force). This article may be too technical for most readers to understand. ...
The pound-force is a non-SI unit of force or weight (properly abbreviated lbf or lbf). The pound-force is equal to a mass of one pound multiplied by the standard acceleration due to gravity on Earth (which is defined as exactly 9. ...
The distance between two points is the length of a straight line segment between them. ...
A foot (plural: feet) is a non-SI unit of distance or length, measuring around a third of a metre. ...
Doing 550 foot-pounds of work on an object in one second is equal to a horsepower, an Imperial and U.S. customary unit of power. Look up Second in Wiktionary, the free dictionary The second (symbol: s) is the SI base unit of time. ...
The horsepower (hp) is the name of several non-metric units of power. ...
// Mechanical power In physics, power (symbol: P) is the amount of work W done per unit of time t. ...
Unit of torque The foot-pound [force] is also the unit of torque, which is conventionally expressed in SI units as newton-meters rather than joules. Sometimes the order of the units is reversed for torque, expressed as pound-feet rather than foot pounds. In physics, torque can be thought of informally as rotational force. Torque is measured in units of newton metres. ...
Newton metre is the unit of moment in the SI system. ...
Strictly speaking, the foot-pound is a different unit, having the dimensions of length×mass, rather than the foot-pound force's length×mass×acceleration, but it has few applications, which is why the abbreviation of "foot-pound force" to "foot-pound" is rarely a problem.
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