An airplane wing, with chord length of \(1.5 \mathrm{~m}\) and span of \(9 \mathrm{~m}\), is designed to move through standard air at a speed of \(7.5 \mathrm{~m} / \mathrm{s}\). A 1:10 scale model of this wing is to be tested in a water tunnel. What speed is necessary in the water tunnel to achieve dynamic similarity? What will be the ratio of forces measured in the model flow to those on the prototype wing?