Free fall is the motion of an object when it is falling solely under the influence of gravity, with no other forces acting on it, like air resistance.

Conditions for an object to be in free fall are:

1. If the body falling with acceleration is equal to the acceleration due to gravity of a heavenly body.
2. The falling body is influenced by the force of gravity only.
3.  The object can start from rest (zero initial velocity) or with an initial velocity. However, after the initial moment, its motion should be influenced only by gravity.
4.  The object should fall in a vacuum or an environment where air resistance is negligible. This ensures that the only significant force acting on the object is gravity.