Here's what it means:
* m/s² stands for meters per second squared, which is the standard unit for acceleration.
* 9.81 m/s² means that the object's velocity increases by 9.81 meters per second every second it falls.
Important Note: This value is an approximation, and the actual acceleration can vary slightly due to factors like:
* Altitude: The acceleration due to gravity decreases slightly as you go higher above the Earth's surface.
* Latitude: The Earth is not a perfect sphere, and the acceleration due to gravity is slightly higher at the poles than at the equator.
* Local density variations: The density of the Earth's crust can vary, which can affect the local gravitational field.
However, for most practical purposes, 9.81 m/s² is a good enough approximation for the acceleration due to gravity at the Earth's surface.
