Drag force
A drag force is the resistance force caused by the motion of a body through a fluid, such as water or air. A drag force acts opposite to the direction of the oncoming flow velocity. This is the relative velocity between the body and the fluid.
Drag = (density) * (square of the velocity) * (Drag coefficient) *(transversal area)
The equation is written
\[F_{D}=\frac{1}{2}\rho v^{2}C_{D}A \]
We have:
FD= Drag force.
ρ= fluid density.
v= Relative velocity between the fluid and the object.
CD=Drag coefficient.
A=Transversal area or cross sectional area.
Drag coefficient, which can vary along with the speed of the body. But typical values range from 0.4 to 1.0 for different fluids (such as air and water)
