* Gravity's Constant Pull: The primary force acting on a freely falling body is gravity. Gravity exerts a constant downward acceleration on the object.

* Acceleration Means Changing Velocity: Acceleration means a change in velocity over time. Since gravity causes acceleration, the velocity of a freely falling body will continuously increase as it falls.

In simpler terms: Imagine dropping a ball. It starts slowly, but as it falls, it gets faster and faster. This increasing speed means its velocity is not uniform, but rather constantly changing.

Important Note: This assumes air resistance is negligible. In reality, air resistance will eventually cause the falling object to reach a terminal velocity where the force of air resistance balances out the force of gravity. At terminal velocity, the object's velocity becomes constant.