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The pound or pound-mass is a unit of mass used in both the British imperial and United States customary systems of measurement. Various definitions have been used; the most common today is the international avoirdupois pound, which is legally defined as exactly 0.453 592 37 kilograms, and which is divided into 16 avoirdupois ounces. [ 1]
A slug is defined as a mass that is accelerated by 1 ft/s 2 when a net force of one pound (lbf) is exerted on it. [ 2] One slug is a mass equal to 32.17405 lb (14.59390 kg) based on standard gravity, the international foot, and the avoirdupois pound. [ 3] In other words, at the Earth's surface (in standard gravity), an object with a mass of 1 ...
This is convenient because one pound mass exerts one pound force due to gravity. Note, however, unlike the other systems the force unit is not equal to the mass unit multiplied by the acceleration unit [ 11 ] —the use of Newton's second law , F = m ⋅ a , requires another factor, g c , usually taken to be 32.174049 (lb⋅ft)/(lbf⋅s 2 ).
1 poundal = force to accelerate 1 pound mass 1 foot/second/second ≈ 0.138 newtons. 1 kip = 1000 lbf ≈ 4.44822 kN; Energy 1 foot-pound ≈ 1.356 J; 1 British thermal unit (Btu) ≈ 1.055 kJ (1,054–1,060 J, depending on which of several definitions of BTU is used) 1 Quad 10 15 BTU, one quadrillion BTU (short-scale) or 1.055×10 18 joule (1. ...
Such scales are used to make the most accurate of fine measurements, such as in the needs of empirical chemistry. Avoirdupois ( / ˌævərdəˈpɔɪz, ˌævwɑːrdjuːˈpwɑː /; [ 1] abbreviated avdp.) [ 2] is a measurement system of weights that uses pounds and ounces as units. [ 3][ 4] It was first commonly used in the 13th century AD and ...
The slug is defined as the amount of mass that accelerates at 1 ft/s 2 when one pound-force is exerted on it, and is equivalent to about 32.2 pounds (mass). The kilogram-force is a non-SI unit of force, defined as the force exerted by a one-kilogram mass in standard Earth gravity (equal to 9.80665 newtons exactly).
In scientific contexts, mass is the amount of "matter" in an object (though "matter" may be difficult to define), but weight is the force exerted on an object's matter by gravity. [ 1] At the Earth 's surface, an object whose mass is exactly one kilogram weighs approximately 9.81 newtons, the product of its mass and the gravitational field ...
A massive 1,300-pound bull escaped from a Massachusetts farm Monday morning, causing a highway crash before charging at officers, police said.. Workers at Mathieu Farms in Raynham, Massachusetts ...