Here's why:
* Gravity: The primary force acting on the falling body is gravity. Gravity exerts a constant force on the object, pulling it downwards.
* Acceleration: Since force causes acceleration (Newton's Second Law), the constant force of gravity results in a constant acceleration. This acceleration is approximately 9.8 m/s² near the Earth's surface and is often denoted as "g".
* Uniform Acceleration: Uniform acceleration means that the velocity of the object changes by the same amount in every equal time interval. In this case, the falling object's velocity increases by 9.8 m/s every second.
Important Note: While the acceleration is uniform, the velocity of the falling body is not uniform. The velocity continuously increases as the object falls due to the constant acceleration.