Here's why:
* Gravitational force is measured in Newtons (N).
* Mass is measured in kilograms (kg).
The strength of a gravitational field is defined as the force per unit mass experienced by an object in that field. Therefore, the units are Newtons per kilogram (N/kg).
Important Note: You might also see gravitational field strength expressed in meters per second squared (m/s²). This is because the acceleration due to gravity (g) is a measure of the gravitational field strength. The relationship is:
g = F/m = (N/kg) = (kg*m/s²)/kg = m/s²
Both units (N/kg and m/s²) are equivalent and represent the same physical quantity: the strength of the gravitational field.
