Here's what that means:
* Acceleration: A change in velocity over time. Gravity constantly pulls objects towards the center of the Earth, causing them to speed up.
* 9.81 m/s²: For every second an object falls, its downward velocity increases by 9.81 meters per second.
Important Notes:
* Not constant: The actual value of gravitational acceleration can vary slightly depending on factors like altitude and latitude.
* Near the Earth's surface: This value is accurate for objects near the Earth's surface. The further away from Earth you go, the weaker gravity becomes.
Let me know if you have any other questions!