2. The aerodynamic drag of a new sports car is to be predicted at a speed of 60.0 mi/h at an air temperature of 25C. Automotive engineers build a one-third scale model of the car to test it in a wind tunnel with the same air temperature of 25C. The drag force is measured with a drag balance, and the moving belt is used to simulate the moving ground (from the car's frame of reference). Determine how fast the wind tunnel should be run to achieve similarity between the model and the prototype. Assume that the flow can be treated as incompressible, and verify this after determining the air speed in the wind tunnel. Wind tunnel test section PmPm Moving belt Drag balance FD.m