Aerospace Engineering > GATE 2017 > Dimensional Analysis and Similarity
A football, meant to be thrown at 100 km/h in sea level air (ρ=1.22 kg/m3, μ=1.78×10-5N-s/m2). is to be tested using a one-quarter scale model in a water tunnel (ρ=1000 kg/m3, μ=10-3N-s/m2). For dynamic similarity, the ratio of the model force to the prototype force is _______ (round to nearest integer).
Correct : 4 to 4
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