The term foot-pound is also used as a unit of torque (see pound-foot (torque)). In the United States this is often used to specify, for example, the tightness of a fastener (such as screws and nuts) or the output of an engine. Although they are dimensionally equivalent, energy (a scalar) and torque (a Euclidean vector) are distinct physical quantities. Both energy and torque can be expressed as a product of a force vector with a displacement vector (hence pounds and feet); energy is the scalar product of the two, and torque is the vector product.
Although calling the torque unit "pound-foot" has been academically suggested, both are still commonly called "foot-pound" in colloquial usage. To avoid confusion, it is not uncommon for people to specify each as "foot-pound of energy" or "foot-pound of torque" respectively.
^IEEE Std 260.1™-2004, IEEE Standard Letter Symbols for Units of Measurement (SI Units, Customary Inch-Pound Units, and Certain Other Units)
^Fletcher, Leroy S.; Shoup, Terry E. (1978), Introduction to Engineering, Prentice-Hall, ISBN978-0135018583, LCCN 77024142.: 257
^Budynas, Richard G.; Nisbett, J. Keith (2014-01-27). Mechanical Engineering Design. McGraw Hill Education. ISBN978-0073529288.
February 16, 2024
foot, pound, energy, confused, with, pound, foot, torque, foot, poundal, this, article, needs, additional, citations, verification, please, help, improve, this, article, adding, citations, reliable, sources, unsourced, material, challenged, removed, find, sour. Not to be confused with Pound foot torque or Foot poundal This article needs additional citations for verification Please help improve this article by adding citations to reliable sources Unsourced material may be challenged and removed Find sources Foot pound energy news newspapers books scholar JSTOR June 2018 Learn how and when to remove this template message The foot pound force symbol ft lbf 1 ft lbf 2 or ft lb 3 is a unit of work or energy in the engineering and gravitational systems in United States customary and imperial units of measure It is the energy transferred upon applying a force of one pound force lbf through a linear displacement of one foot The corresponding SI unit is the joule though in terms of energy one joule is not equal to one foot pound Foot poundUnit systemEnglish engineering units and British gravitational systemUnit ofEnergySymbolft lbf ft lbConversions1 ft lbf in is equal to SI units 1 355818 J CGS units 13 558 180 erg Contents 1 Usage 2 Conversion factors 2 1 Energy 2 2 Power 3 See also 4 ReferencesUsage editThe term foot pound is also used as a unit of torque see pound foot torque In the United States this is often used to specify for example the tightness of a fastener such as screws and nuts or the output of an engine Although they are dimensionally equivalent energy a scalar and torque a Euclidean vector are distinct physical quantities Both energy and torque can be expressed as a product of a force vector with a displacement vector hence pounds and feet energy is the scalar product of the two and torque is the vector product Although calling the torque unit pound foot has been academically suggested both are still commonly called foot pound in colloquial usage To avoid confusion it is not uncommon for people to specify each as foot pound of energy or foot pound of torque respectively In small arms ballistics and particularly in the United States the foot pound is often used to specify the muzzle energy of a bullet Conversion factors editEnergy edit 1 foot pound force is equivalent to 1 355 817 948 331 400 4 joules 13558 179 483314 004 ergs about 1 285 10 3 British thermal units 0 323832 calories 8 462238 10 18 eV 8 462238 EeV 8 462238 10 9 GeVPower edit 1 foot pound force per second is equivalent to 1 3558179483314 watts 1 818 10 3 horsepowerRelated conversions 1 watt 44 253728 96 ft lbf min 0 737562 149 333 ft lbf s 1 horsepower mechanical 33 000 ft lbf min 550 ft lbf sSee also editConversion of units Pound foot torque Poundal Slug unit Units of energyReferences edit IEEE Std 260 1 2004 IEEE Standard Letter Symbols for Units of Measurement SI Units Customary Inch Pound Units and Certain Other Units Fletcher Leroy S Shoup Terry E 1978 Introduction to Engineering Prentice Hall ISBN 978 0135018583 LCCN 77024142 257 Budynas Richard G Nisbett J Keith 2014 01 27 Mechanical Engineering Design McGraw Hill Education ISBN 978 0073529288 Retrieved from https en wikipedia org w index php title Foot pound energy amp oldid 1197514862, wikipedia, wiki, book, books, library,
