Here's why:

* Force of Gravity: This is the force of attraction between any two objects with mass.

* Acceleration due to Gravity (g): This is the rate at which an object accelerates towards the Earth due to gravity. It's a constant value on Earth, approximately 9.8 m/s².

While we often use the term "gravity" to refer to both the force and the acceleration, it's important to distinguish between them:

* Force is a vector quantity (has magnitude and direction) and is measured in Newtons (N).

* Acceleration is also a vector quantity and is measured in meters per second squared (m/s²).

So, while "gravity" is a common term, the specific measurement of the force of gravity is acceleration due to gravity (g).