WHAT IS IT?
DRAG is a force that acts parallel and in the same direction as the airflow.
WHAT DOES IT DO?
The drag coefficient of a vehicle impacts the way the automobile passes through surrounding air. So the drag coefficient determines how much air resistance your car faces while moving. The lower the drag coefficient number the less air resistance your car has.
WHY DO WE NEED IT?
For fuel economy. Lower numbers are better for both your bank account and the environment.
The more aerodynamic a vehicle is, the better its dynamic ability will be too. Aerodynamic drag increases with the square of speed, therefore it becomes critically important at higher speeds.
A car such as a Mercedes-Benz CLA, with its sleek and low-sling design, has a better drag coefficient than a VW Microbus, which is basically shaped like a brick.
