Here's why:

* Newton's Second Law of Motion: This law states that force (F) is directly proportional to mass (m) and acceleration (a). Mathematically, this is written as: F = m * a

* Units:

* Mass is measured in kilograms (kg).

* Acceleration is measured in meters per second squared (m/s²).

* Combining the units: Therefore, the unit of force is kg * m/s², which is defined as a Newton (N).

So, when you see a force measured in Newtons, you know it represents the amount of force needed to accelerate a 1 kg object at a rate of 1 meter per second squared.