The drag coefficient $C_d$ is a dimensionless quantity. It is used to compare the drag on different cars at different speeds. $C_d$ is given by the equation $C_d = \frac{2F}{v^n \rho A}$, where $F$ is the drag force on the car, $\rho$ is the density of the air, $A$ is the cross-sectional area of the car and $v$ is the speed of the car. Find the value of $n$.
- A1
- B2
- C3
- D4