Here's what it means:
* Free Fall: This refers to the motion of an object solely under the influence of gravity. No other forces, like air resistance, are acting on it.
* Acceleration: This means the object's velocity is continuously increasing as it falls.
* 9.81 m/s²: Every second, the object's downward velocity increases by 9.81 meters per second.
Important Notes:
* Variation: The value of g is not perfectly constant. It varies slightly depending on factors like altitude, latitude, and the local density of the Earth.
* Air Resistance: In reality, air resistance will affect falling objects, reducing their acceleration and causing them to reach a terminal velocity.
* Standard Value: For calculations, 9.81 m/s² is often used as a standard value for g.
Let me know if you have any other questions about gravity!
