Imperial/US

Livre

Définition

Une unité de masse impériale égale à exactement 453,59237 grammes (16 onces avoirdupois), utilisée aussi comme unité de force (livre-force) égale à 4,44822 newtons.

Explication

The pound (lb) abbreviation comes from the Latin 'libra pondo' (a pound by weight). As a force unit, one pound-force is the weight of one pound mass under standard gravity (9.80665 m/s²). The US uses pounds for body weight where most countries use kilograms; 1 kg = 2.20462 lb. The pound sterling currency takes its name from a pound of silver.

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