Here's why:
* Gravity: The Earth's gravitational pull is the force acting on objects near its surface.
* Acceleration: Acceleration is the rate of change of velocity. When an object falls freely, its velocity increases constantly due to the gravitational force.
* Constant Acceleration: The acceleration due to gravity is nearly constant near the Earth's surface. This means the object's velocity increases by approximately 9.8 meters per second every second it falls.
Important Note: This acceleration value is an approximation. The actual acceleration due to gravity varies slightly depending on factors like altitude and location on Earth.
