The velocity at which a falling object travels when the force of air resistance exactly matches downward gravity is called terminal velocity.

Here's why:

* Gravity: Pulls the object downwards, constantly accelerating it.

* Air Resistance: As the object falls faster, it encounters more air resistance, which opposes its motion.

* Terminal Velocity: When the force of air resistance equals the force of gravity, the object stops accelerating. It reaches a constant speed, known as terminal velocity.

At terminal velocity, the object continues to fall, but its speed remains constant.