Question

The drag coefficient Cd is a dimensionless parameter and is a function of drag force Fd, density rho, velocity V, and area A. The drag coefficient is expressed as:

A. FdV²/2rhoA
B. 2Fd/rhoVA
C. FdA/rhoV
D. rhoVA²/Fd
E. 2Fd/rhoV²A

Answer 1

The drag coefficient can be calculated using the formula Cd = (2 * Fd) / (rho * V^2 * A), making option B the correct expression for the drag coefficient.

Step-by-step explanation:

The student is asking about the formula for the drag coefficient (Cd) in the context of physics. The drag coefficient is a dimensionless quantity that describes the resistance of an object in a fluid environment, such as air or water. It's calculated with the following formula: Cd = (2 * Fd) / (rho * V2 * A), where Fd stands for the drag force, rho represents the density of the fluid, V is the velocity of the object, and A is the cross-sectional area of the object facing the fluid flow. Therefore, the correct expression for the drag coefficient given the options is B. 2Fd/rhoVA.