An object is falling downward through Earth's atmosphere. In which direction is the air resistance force?

The upward force which is exerted against a falling object is

A force which causes objects to fall is

When a falling object stops accelerating and falls at a constant speed, it is

Complete the sentence.

It is not the difference in gravity that causes objects to fall at different speeds, it’s the difference in the amount of__________________.

If you jump out of an airplane, which two forces are acting on you?