Here's why:
* Gravity: The primary force acting on the falling body is gravity. Gravity exerts a constant force on all objects near the Earth's surface.
* Acceleration: Force causes acceleration, and since the force of gravity is constant, the acceleration due to gravity is also constant. This acceleration is approximately 9.8 m/s² near the Earth's surface.
* Velocity: The body's velocity increases at a constant rate because of the constant acceleration. It doesn't move with a constant velocity.
Important Note: We're assuming negligible air resistance for this explanation. In reality, air resistance can influence the falling body's motion, making it non-uniform.
