The acceleration of an object in free fall is approximately 9.8 m/s², which is often rounded to 10 m/s² for simplicity. This is also known as the acceleration due to gravity.

Here's what it means:

* Acceleration: A change in velocity over time.

* Free Fall: When the only force acting on an object is gravity.

Important Notes:

* This value is constant near the Earth's surface. It slightly varies depending on factors like altitude and latitude.

* This acceleration applies to all objects, regardless of their mass. A feather and a bowling ball will fall at the same rate in a vacuum (ignoring air resistance).

* Air resistance can significantly affect the actual acceleration of falling objects, especially for objects with large surface areas.

Let me know if you have any more questions about free fall!