[ R ] to reset Air resistance is a physical phenomenon generated when an object interacts with surrounding air molecules during motion. As an object moves, it collides with air molecules, resulting in these collisions exerting a force on the object in the opposite direction of its motion, known as air resistance. Here is the formula: F = -0.5 * ρ * v^2 * A * Cd * nv As some are constants, it can be simplified to: F = -v^2 * Cd * nv (this is the code in the program) F: drag force ρ: air density v: object velocity A: contact area Cd: shape coefficient (circle is 1) nv: normalized velocity The magnitude of air resistance depends on several factors, including the shape, surface area, velocity, and air density of the object. Generally, as the velocity of an object increases, so does the air resistance, as higher speeds lead to more frequent collisions between the object and air molecules. Additionally, the shape and surface area of the object also affect air resistance, with more streamlined shapes producing less air resistance. Air resistance plays a crucial role in the design of transportation vehicles, buildings, sports equipment, and more. Designers and engineers must consider how to minimize air resistance to improve efficiency and performance. In sports such as cycling, automotive racing, and aviation, reducing air resistance can enhance the energy efficiency, speed, and stability of equipment.