Newton

The Newton (N) is the standard unit of force in the International System of Units (SI). It is defined as the force required to accelerate a one-kilogram mass at a rate of one meter per second squared. In other words, 1 N = 1 kg·m/s². This definition is derived directly from Newton’s Second Law of Motion, which states that force equals mass times acceleration (F = ma). The Newton is a relatively small unit in practical applications, so larger forces are often expressed in kilonewtons (kN), where 1 kN = 1000 N. The Newton provides a consistent and universal way to measure force in engineering, physics, and mechanical design, ensuring compatibility across different fields and applications.

On Earth, at rest, this mass applies one Newton of force due to the effect of gravity on its mass.