Here's why:

* Gravity: The only force acting on a freely falling body is gravity.

* Constant Acceleration: Gravity exerts a constant acceleration on all objects near the Earth's surface, regardless of their mass. This acceleration is approximately 9.8 m/s² (meters per second squared) and is directed downwards.

Key characteristics of uniformly accelerated motion:

* Constant acceleration: The velocity of the object changes by the same amount in equal time intervals.

* Non-constant velocity: The object's velocity is continuously increasing as it falls.

* Equations of motion: We can use specific equations to describe the motion, like the following:

* v = u + at (final velocity, initial velocity, acceleration, time)

* s = ut + (1/2)at² (distance, initial velocity, acceleration, time)

Important Note: This description assumes negligible air resistance. In real-world scenarios, air resistance plays a role and the motion becomes more complex.