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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]
Human body weight is a person's mass or weight.. Strictly speaking, body weight is the measurement of mass without items located on the person. Practically though, body weight may be measured with clothes on, but without shoes or heavy accessories such as mobile phones and wallets, and using manual or digital weighing scales.
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 Δν Cs. —
Established officially at 140 lb (63.5 kg) in 1920 by Walker Law; recognized in 1959 Super Featherweight: 126–130 lb (57.2 - 59 kg) Established at 130 lb (59 kg) in 1920 by Walker Law; recognized in 1959 Super Bantamweight: 118–122 lb (53.5 - 55.3 kg) Established at 122 lb (55.3 kg) in 1920 by Walker Law; recognized in 1976 Super Flyweight
36 kg (79 lbs) 39 kg (86 lbs) 42 kg (93 lbs) 46 kg (101 lbs) 50 kg (110 lbs) 54 kg (119 lbs) 58 kg (128 lbs) 62 kg (137 lbs) 66 kg (146 lbs) Cadets (female youths aged 16–17, and female youths at age 15 with a medical certificate and parental authorization) compete in freestyle wrestling in the following 10 weight classes: [3]
In France it used to be defined as 100 livres (pounds), about 48.95 kg (108 lb), and has been redefined as 100 kg (mesures usuelles), thus called metric quintal with symbol qq. In Spain , the quintal is still defined as 100 libras , or about 46 kg (101 lb), but the metric quintal is also defined as 100 kg; [ 3 ] In Portugal a quintal is 128 ...
When an object's weight (its gravitational force) is expressed in "kilograms", this actually refers to the kilogram-force (kgf or kg-f), also known as the kilopond (kp), which is a non-SI unit of force. All objects on the Earth's surface are subject to a gravitational acceleration of approximately 9.8 m/s 2.
However, the names of all SI mass units are based on gram, rather than on kilogram; thus 10 3 kg is a megagram (10 6 g), not a *kilokilogram. The tonne (t) is an SI-compatible unit of mass equal to a megagram (Mg), or 10 3 kg. The unit is in common use for masses above about 10 3 kg and is often used with SI prefixes.