Yes, it probably has some air resistance that will affect its motion.

In part II, I will add air resistance and see what happens.

Finally, the author compares no- air resistance with air resistance for some cases.

With so little air resistance, it's hard to control one's body position.

With less air resistance, water boils at a temperature below 212 degrees.

There is still energy going into moving the legs and air resistance.

The drop distance is small enough that air resistance should be negligible.

I guess there could be air resistance, but that's kind of high.

What force is pushing in the opposite direction to the air resistance?

The gravitational force is fairly straightforward, but air resistance is more complicated.

This make the air resistance force ginormous and the resulting acceleration deadly.

The runner would need to do work just because of this air resistance.

The problem is that air resistance depends on the velocity of the object.

What about the work needed to push against this air resistance?

One thing that will obviously change in the air resistance on your car.

Well, it would if air resistance on the water drop were not important.