The Newton (N) is the standard derived unit of force within the International System of Units (SI). Force is defined as the rate of change of momentum, and the unit quantifies the interaction between two masses resulting in acceleration. Fundamentally, one Newton is equivalent to one kilogram-meter per second squared ($\text{kg} \cdot \text{m}/\text{s}^2$). This unit of measurement allows for the calculation of mechanical work and is crucial in physics for describing gravitational forces, electromagnetic forces, and inertial forces, providing a foundational metric for describing interactions across various fields of physics.