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Slug

The slug is a unit of mass used primarily in the U.S. customary system and British engineering contexts.

1 slug = 32.174 pounds (lb) (mass)
Equivalent to approximately 14.5939 kilograms (kg)
Defined so that when a force of one pound-force (lbf) acts on a mass of one slug, it accelerates at 1 ft/s² (using $F = ma$ in imperial units).

Key Facts:

Used mainly in physics and engineering for calculations involving Newton’s second law in imperial units
Allows consistent use of pound-force and pound-mass without extra conversion factors
Useful in dynamics, ballistics, and engineering mechanics

The slug bridges the gap between force and mass in the imperial system, making calculations easier when using pound-force units.

Kilogram (kg)

The kilogram is the SI base unit of mass, representing the amount of matter in an object.

It is symbolized as kg.
Since 2019, the kilogram is defined by fixing the value of the Planck constant to exactly $6.62607015 \times 10^{-34}$ joule seconds, linking mass to fundamental physical constants.
Before this, it was defined by a physical platinum-iridium prototype.
It is the only SI base unit still using the prefix "kilo" in its name.

Key points:

The kilogram ensures accurate and universal mass measurements across the world.

Convert slug to kilogram kg Online | Free weight-and-mass Converter

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