A football,meant to be thrown at 60 mi/h in sea—level air (ρ=1.22 kg/m3, μ=1.78E—5N s/m2) is to be tested using a one—quarter (1/4) scale model in a water tunnel (ρ=998 kg/m3, μ=0.0010 N s/m2). For dynamic similarity, what is the ratio of prototype force to model force?