Here's why:
* Gravity: Earth's gravitational force pulls all objects towards its center with a constant acceleration, denoted by 'g'. This acceleration is approximately 9.8 m/s².
* Neglecting Air Resistance: In a simplified scenario where we ignore air resistance, the object experiences only the force of gravity. As a result, its acceleration remains constant throughout the fall.
Important Note: In reality, air resistance does play a role and will affect the acceleration of a falling object. The faster the object falls, the greater the air resistance becomes. Eventually, the object reaches a terminal velocity where the force of air resistance balances out the force of gravity, and the acceleration becomes zero.