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W = F[itex]_{d}[/itex] * d

F[itex]_{d}[/itex] = C[itex]_{d}[/itex] ρ A[itex]_{f}[/itex] [itex]V^{2}[/itex]/2

and i have equated the loss of kinetic energy to the work done by the parachute, since the velocity is not constant and therefore the work and kinetic energy are not constant i end up with the following:

∫C[itex]_{d}[/itex] ρ A[itex]_{f}[/itex] V dV * d = ∫m V dV

does this mean that the distance to slow down the car from one velocity to another is independent of velocity? surely the distance to go from 1000mph to 100mph is not the same as the distance to go from 200mph to 100mph

thanks in advance