A solid body moves through air, at very high speed V faster than the velocity of molecules Show that the drag force on the body is proportional to `AV^(2)` where A is the frontal area of the body.

Explanation

`F=Mxx(dV)/(dt)`
`F=rhoV((dV)/dt)`
`F=rhoA (dx)/(dt)xx(dV)=rhoAV^(2)`
`F prop AV^(2)`