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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]
The kilogram, symbol kg, is the SI unit of mass. It is defined by taking the fixed numerical value of the Planck constant h to be 6.626 070 15 × 10−34 when expressed in the unit J⋅s, which is equal to kg⋅m 2 ⋅s −1, where the metre and the second are defined in terms of c and ΔνCs. — CGPM [6] [7]
The stone or stone weight (abbreviation: st.) [1] is an English and British imperial unit of mass equal to 14 pounds (6.35 kg). [nb 1] The stone continues in customary use in the United Kingdom and Ireland for body weight . England and other Germanic -speaking countries of Northern Europe formerly used various standardised "stones" for trade ...
445 kg 981 lb 70 st 1 lb 1.93 m 6 ft 4 in 119 In 2014 weighed 140 kg (310 lb; 22 st 1 lb), a total weight loss of 304 kg (670 lb; 47 st 12 lb). 1960 Keith Martin United Kingdom: M 445 kg 981 lb 70 st 1 lb 1.69 m 5 ft 7 in 155 1970–2014 (44) Denny Welch United States: M 444 kg 979 lb 69 st 13 lb
Imperial units. 0.224809 lbf. The newton (symbol: N) is the unit of force in the International System of Units (SI). It is defined as , the force which gives a mass of 1 kilogram an acceleration of 1 metre per second squared. It is named after Isaac Newton in recognition of his work on classical mechanics, specifically his second law of motion .
In science and engineering, the weight of an object, is the force acting on the object due to acceleration of gravity. [1] [2] [3] Some standard textbooks [4] define weight as a vector quantity, the gravitational force acting on the object. Others [5] [6] define weight as a scalar quantity, the magnitude of the gravitational force.
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 ...
The pound-force is the product of one avoirdupois pound (exactly 0.45359237 kg) and the standard acceleration due to gravity, approximately 32.174049 ft/s 2 (9.80665 m/s 2). [5] [6] [7] The standard values of acceleration of the standard gravitational field ( g n ) and the international avoirdupois pound (lb) result in a pound-force equal to 32 ...