You're describing a situation where the only force acting on an object is gravity. This scenario is known as free fall.

Here's what that means:

* No air resistance: The object is falling through a vacuum or an environment with negligible air resistance.

* Constant acceleration: The object accelerates downwards at a constant rate due to gravity, usually denoted as 'g'. On Earth, g is approximately 9.8 m/s².

* Negligible other forces: Forces like friction, drag, or lift are not significant enough to influence the object's motion.

Examples of free fall:

* A feather falling in a vacuum chamber.

* A skydiver falling at a high altitude (before deploying their parachute).

* An object dropped from a tall building (ignoring air resistance).

Let me know if you have any other questions!