I don't know really but i think it is just SCIENCE
Gravity.
air resistance.
In free fall.
Free fall describes an object that is falling and the only force acting on it is gravity. In free fall, the object is accelerating downward due to the force of gravity without any other forces affecting its motion.
Gravity is forcing an object to fall to the ground. Another force is friction from air pressure on the falling object.
Such an object is said to be in free fall.
downward motion
free fall
The object is said to be in free fall, such as in orbit.
When an object is in free fall, gravity is the only force acting on it. This occurs when the object is falling under the influence of gravity alone, with no other forces like air resistance or drag affecting its motion.
This is commonly known as Free Fall
= Terminal velocity =