How terminal velocity can be achieved?

Terminal velocity is achieved when the force of gravity pulling an object downward is balanced by the drag force acting upward against it. As an object falls, it accelerates until the drag force increases with speed to equal the weight of the object. At this point, the net force becomes zero, and the object falls at a constant speed, known as terminal velocity. This speed varies depending on factors like the object's mass, shape, and the density of the fluid through which it falls.