A falling object that has reached its terminal speed continues to gain momentum.

Here's why:

* Terminal speed is the constant speed that a freely falling object eventually reaches when the force of air resistance equals the force of gravity.

* Momentum is a measure of mass in motion, calculated by multiplying an object's mass by its velocity.

* Even though the object is no longer accelerating (its speed is constant), it still has a velocity, and therefore continues to gain momentum.

Let me know if you'd like a more detailed explanation of these concepts!