Here's why:
* Gravity's Influence: The primary force acting on a free-falling body is gravity. Gravity constantly pulls the object downwards, causing it to accelerate.
* Acceleration: Acceleration means a change in velocity. Since gravity causes acceleration, the velocity of a free-falling body continuously increases.
* Terminal Velocity: The only reason a free-falling body might appear to have a constant velocity is when it reaches terminal velocity. This occurs when the force of air resistance equals the force of gravity, resulting in a net force of zero. At this point, the object stops accelerating and falls at a constant speed.
In summary: Free-falling bodies do not have constant velocity because gravity causes them to accelerate. However, they can reach a constant velocity (terminal velocity) when air resistance balances out the force of gravity.
