Newton (unit)


The newton is the International System of Units derived unit of force. It is named after Isaac Newton in recognition of his work on classical mechanics, specifically Newton's second law of motion. One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.
See below for the [|conversion factors].

Definition

One newton is the force needed to accelerate one kilogram of mass at the rate of one metre per second squared in the direction of the applied force.
The units "metre per second squared" can be understood as change in velocity per time, i.e. an increase of velocity by 1 metre per second every second.
In 1946, Conférence Générale des Poids et Mesures Resolution 2 standardized the unit of force in the MKS system of units to be the amount needed to accelerate 1 kilogram of mass at the rate of 1 metre per second squared. In 1948, the 9th CGPM Resolution 7 adopted the name newton for this force. The MKS system then became the blueprint for today's SI system of units. The newton thus became the standard unit of force in the Système international d'unités, or International System of Units.
In more formal terms, Newton's second law of motion states that the force exerted by an object is directly proportional to the acceleration of that object, namely:
where the proportionality constant,, represents the mass of the object undergoing an acceleration,. As a result, the newton may be defined in terms of kilograms, metres, and seconds by

Examples

At average gravity on Earth, a kilogram mass exerts a force of about 9.8 newtons. An average-sized apple exerts about one newton of force, which we measure as the apple's weight.
The weight of an average adult exerts a force of about 608 N.

Commonly seen as kilonewtons

It is common to see forces expressed in kilonewtons where. For example, the tractive effort of a Class Y steam train locomotive and the thrust of an F100 jet engine are both around 130 kN.
One kilonewton, 1 kN, is equivalent to, or about 100 kg of load under Earth gravity.
So for example, a platform that shows it is rated at, will safely support a load.
Specifications in kilonewtons are common in safety specifications for: