1.

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.

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


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