resistance coefficient

The resistance coefficient, often called the drag coefficient, measures how much an object resists moving through a fluid like air or water. It depends on the shape, surface texture, and flow conditions around the object. A higher resistance coefficient means more effort or energy is needed to keep the object moving at a certain speed because it faces greater resistance. Engineers use this value to predict how objects like cars, airplanes, or boats will perform in their environments, helping optimize shapes for efficiency and ease of movement.