Here's why:
* Gravity is a constant force: The force of gravity near the Earth's surface is essentially constant. It doesn't change with the object's speed.
* Acceleration is caused by force: Acceleration is the rate of change of velocity. Since the force of gravity is constant, the acceleration due to gravity remains constant as well.
Important Note: This assumes we're talking about objects falling relatively close to the Earth's surface. As objects fall from extremely high distances, the force of gravity does slightly decrease, leading to a small decrease in acceleration. However, for everyday scenarios, we can generally consider acceleration due to gravity as constant.
