2005年2月17日 · The equation, 1/2*C*A*P*v^2, is a constructive theory based on experimental evidence and is used to calculate the drag force on an object. The conversation also discusses the coefficient of Drag, which is defined as P/(1/2*rho*U^2) and is …

2024年3月6日 · In summary, the drag coefficient, often represented as the constant K, quantifies the drag force experienced by an object moving through a fluid, such as air or water. It is a dimensionless number that depends on the shape of the …

2022年8月26日 · Hello! I have a question about aerodynamic drag. It sounds simple but when trying to understand why the relative velocity can be used in calculations I have some trouble. The formula is 0.5*rho*u2*cd*A where u is the relative velocity between the object and the fluid. The cd value depends on the...

2024年1月26日 · To compute the drag of any object fully analytically already is a momentous task for anything more complex than a flat plate in laminar flow, let alone if the object moves... Note that the Rayleigh's drag equation is actually a semi-empirical equation where the Cd is determined experimentally.

2013年9月23日 · Regarding the drag force on an object, in practice it is not proportional to either v or v 2. The drag coefficient is a function of the velocity that needs to be measured. However, as implied by jhae2.718, in the limit of very low velocities, the drag coefficient is inversely proportional to the velocity.

2009年4月5日 · The drag equation is a mathematical formula used to calculate the drag force experienced by an object moving through a fluid. It represents the relationship between the drag force, the fluid density, the object's velocity, its cross-sectional area, and a drag coefficient that represents the object's shape and surface roughness.

2020年7月31日 · This is basically the wave equation with Δm representing a small piece of mass from an interval of the string and two forces added to the right side. He defines the drag from air friction as F = -C*A*v^2. I can accept this. However, he then defines area with A = 2 * σ * Δx. I'm not sure of what σ means here.

2011年1月29日 · What is velocity in the drag equation? Velocity in the drag equation refers to the speed at which an object is moving through a medium, such as air or water. How is velocity related to drag force? Velocity is directly related to drag force in the drag equation. As velocity increases, so does drag force, meaning that the faster an object moves ...

2016年3月14日 · Assuming that the drag force magnitude is given by the equation D= bv, where b is the drag parameter and v is the instantaneous velocity magnitude of the object. (a) Show that the vertical displacement through which a dropped object must fall from to reach X% of its terminal velocity is given by the equation: Δy= (v^2 ty /g)*[(X/100)-ln((100-x ...

2009年10月3日 · Look closely at the second equation. It is a private case of the first. The factor of [tex]\tfrac{1}{2}[/tex] is pretty weird too. All you need to remember is what the drag force is proportional to, and that's fairly simple: The higher the area perpendicular to the flow - …