Here's why:
* Gravitational field strength is the force of gravity acting on a unit mass.
* Force is measured in Newtons (N).
* Mass is measured in kilograms (kg).
Therefore, the unit of gravitational field strength is Newtons per kilogram (N/kg), representing the force per unit mass.
It's important to note that gravitational field strength is also equivalent to acceleration due to gravity, which is measured in meters per second squared (m/s²). This is because the force of gravity causes objects to accelerate towards the center of the Earth.
