gravity and air resistance both act on a free falling object.
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The downward force acting on an object in free fall is the force of gravity. This force is always directed towards the center of the Earth and causes acceleration of the object towards the ground.
The two states that exist when the only force acting on an object is gravity are free fall and equilibrium. In free fall, the object is accelerating downward due to gravity, while in equilibrium, the object is either at rest or moving at a constant velocity with no net force acting on it.
The object is said to be in free fall.
The force of gravity puts an object into free fall. When an object is dropped, the force of gravity acting on it causes it to accelerate downwards towards the Earth.
You're probably thinking of "free fall".