Free fall is when an object is falling with no driving force (other than gravity) acting on it. A free-fallling object in a fluid (e.g. air) will eventually reach terminal velocity. The most common example you will see is a skydiver.
Free-fallers reach a terminal velocity
When free-falling objects first set off they have much more force accelerating them than resistance slowing them down. As the velocity increases the resistance builds up. This gradually reduces the acceleration until eventually the resistance force is equal to the accelerating force and then it won't be able to accelerate anymore. It will have reached its terminal velocity.
The terminal velocity of falling objects depends on…