Here's why:

* Newton's Second Law: This law states that force is directly proportional to mass and acceleration.

* Force (F) = Mass (m) x Acceleration (a)

* Units:

* Mass is typically measured in kilograms (kg).

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

* Therefore, force is measured in kg * m/s², which is defined as a Newton (N).

So, 1 Newton is the force required to accelerate a 1 kg mass at 1 m/s².