KGF Unit Full Form

In Physics, every unit can be related to one another through unit conversions without violating the laws of nature or Physics. As we know, the kilogram is the SI unit of mass and Newton is the SI unit of force. From Newton’s second law of motion, we can say that kilogram and Newton are directly proportional, which means that any change in the Kg unit of mass will result in a change in the Newton unit of force, while acceleration remains constant. The full form of kgf is kilogram-force which is a non-standard unit of force and it is classified as a unit that is not accepted by the SI units system.

This Story also Contains

1. History
2. Gravitational Units of Force: kgf & gf
3. Relation Between Kilogram-force (kgf) And Newton (N)

History

The gram-force and the kilogram-force were never clearly defined units until 1901, when the CGPM (General Conference on Weights and Measures) adopted a standard acceleration due to gravity of

\[9.80665{\text{ m/}}{{\text{s}}^2}\] for this purpose, although they had been used before in force measurements of low accuracy. Even then, the proposal to define the kilogram-force as the standard unit of force was explicitly rejected. Instead, the unit Newton was proposed in 1913 and adopted in 1948. The kilogram-force was never part of the International System of Units (SI), which was adopted in 1960.

Before that, this unit was widely used in much of the world. It is still used for some purposes, such as for the tension of bicycle spokes, for informal indications of pressure in kilograms per square centimetre

( \[1{\text{ kg/c}}{{\text{m}}^2}\] ), which corresponds to the technical atmosphere pressure and is very close to 1 bar and the standard atmosphere (atm), for the draw weight of bows in archery, for the strength of binding wire in gram-force, and to define "metric horsepower" as 75 metre-kiloponds per second.

Different approaches to metric units of mass and force or weight

Gravitational Units of Force: kgf & gf

Kgf and gf both are gravitational units of force. Kgf (kilogram-force) is equal to a mass of one kilogram multiplied by the standard acceleration due to gravity on Earth’s surface which is \[9.80665{\text{m/}}{{\text{s}}^2}\]

So, one kilogram-force is generally equal to 9.80665 N. Similarly, a gram-force is 9.80665 mN and a milligram-force is \[9.80665{\text{ }}\mu {\text{N}}\]

Relation Between Kilogram-force (kgf) And Newton (N)

1 kgf is the weight of a mass of 1 kg at a place where acceleration due to gravity is

\[g = 9.80665{\text{ m/}}{{\text{s}}^2}\]

Now, we have

W = mg \\

\Rightarrow 1kgf = 1kg \times 9.80665{\text{ m}}{\text{.}}{{\text{s}}^{ - 2}}

Therefore,

\Rightarrow 9.80665{\text{ }}kg.{\text{m}}{\text{.}}{{\text{s}}^{ - 2}}

So now we get,

1kgf = 9.80665N