It's important to note that this is an average value. The actual acceleration due to gravity varies slightly depending on factors such as:
* Latitude: Gravity is slightly stronger at the poles and weaker at the equator.
* Altitude: Gravity decreases with increasing altitude.
* Local geology: Variations in the density of the Earth's crust can affect the local gravitational pull.
For most practical purposes, using the value of 9.81 m/s² is sufficient.