About: Absolute foot-pound-second system

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The absolute foot-pound-second system is a system of mechanical units. The foot is the base unit of length or distance, the pound is chosen to be a unit of mass, and the second is the base unit of time. All other mechanical quantities, and specifically force, are expressed in terms of combinations of these three units. In absolute systems, Newton's second law is expressed as F = ma, and since acceleration is the second derivative of a distance with respect to time, if the unit of length or distance is denoted by L, the unit of mass by M, and the unit of time by T, the unit of force becomes a derived unit of dimensions MLT−2, in this case pound·footsecond2, which is known as the poundal.

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rdfs:label	Absolute foot-pound-second system
rdfs:comment	The absolute foot-pound-second system is a system of mechanical units. The foot is the base unit of length or distance, the pound is chosen to be a unit of mass, and the second is the base unit of time. All other mechanical quantities, and specifically force, are expressed in terms of combinations of these three units. In absolute systems, Newton's second law is expressed as F = ma, and since acceleration is the second derivative of a distance with respect to time, if the unit of length or distance is denoted by L, the unit of mass by M, and the unit of time by T, the unit of force becomes a derived unit of dimensions MLT−2, in this case pound·footsecond2, which is known as the poundal.
dbkwik:units/prope...iPageUsesTemplate	dbkwik:resource/j_qbuelcC1gXcKSoMeB8aw==
abstract	The absolute foot-pound-second system is a system of mechanical units. The foot is the base unit of length or distance, the pound is chosen to be a unit of mass, and the second is the base unit of time. All other mechanical quantities, and specifically force, are expressed in terms of combinations of these three units. In absolute systems, Newton's second law is expressed as F = ma, and since acceleration is the second derivative of a distance with respect to time, if the unit of length or distance is denoted by L, the unit of mass by M, and the unit of time by T, the unit of force becomes a derived unit of dimensions MLT−2, in this case pound·footsecond2, which is known as the poundal. This system is not much used; the gravitational foot-pound-second system is far more common in those physics books that use US customary/British Imperial units at all in their treatments of mechanics, and engineers in the United States and Britain, insofatr as they have not gone to metric units, favor the unit force-mass foot-pound-second system.

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