Operational Definitions/Measurement System Analysis. The focus for this month is on operational definitions. Operational definitions are one key to good data collection. They are a necessary, although not sufficient, condition for good data collection. Plus, we will look at how control charts can be used to evaluate the measurement system.
Air resistance induces a drag force on any body that falls through any atmosphere other than a perfect vacuum, and this drag force increases with velocity until it equals the gravitational force, leaving the object to fall at a constant terminal velocity.
To reach terminal velocity the air resistance and the force of gravity, or weight, must be balanced out and the acceleration of the object be equal to zero. For example: We know that weight affects the terminal velocity because it affects the force of gravity on the object.here will be a greater upward force and a smaller terminal velocity. If the object has a smaller surface area there will be less room for air to work on it and there will be less of an upward force and a greater terminal velocity.