We’ve all seen cars that have been built with an aerodynamic taper, presumably to reduce wind resistance. But how important is this REALLY? After all, a pinewood derby race car hardly moves at racetrack speeds. In this section, we perform an experiment where we vary the aerodynamic properties of a pinewood derby race car, and measure the effects on the car’s speed. We show you how to conduct a simple experiment at home to illustrate the effects of aerodynamics on a car’s speed.