Here's why:
* Gravity: The primary force acting on the falling body is gravity. Gravity exerts a constant downward force, causing the body to accelerate.
* Acceleration: Acceleration is the rate of change of velocity. Since gravity constantly pulls the body downward, its velocity increases over time.
* Uniform Acceleration: The acceleration due to gravity (approximately 9.8 m/s²) is constant near the Earth's surface. This means the body's velocity increases at a steady rate.
Key takeaway: While the acceleration of a freely falling body is uniform, its velocity is not. The velocity continuously increases as the body falls.