Bulk air motion is called "wind speed". Motion of individual molecules in air is covered by temperature and the "kinetic theory of gases".
Speed is the rate of motion.
The presence of air affects the rate at which a body falls because air resistance acts as a force opposing the motion of the falling body, slowing it down. In the absence of air, such as in a vacuum, there would be no air resistance and the body would fall at a faster rate due to gravity.
the rate of motion is distance over time
The rate of motion is Speed. (V=distance divided by time).
If you are staying in the same position and not moving, then your rate of motion is zero.
The rate of change of motion is called jerk, jolt, surge, or lurch. The rate of change is derivative of motion with respect to time, velocity, and/or position.
rest
It doesn't. In air, the object may 'fall' at a different rate, depending on any aerodynamic qualities it may have, but otherwise an object will fall at the same rate without respect to it's lateral motion. Of course, unless the object is in a vacuum, its aerodynamic qualities, however limited, will impact the rate at which it falls.
The rate of change in the rate of motion is called acceleration. Acceleration measures how quickly the speed of an object is changing over time.
speed is a measure of the rate of motion.
That is the object's 'speed'.
That's the object's 'speed'.