In terms of wind resistance, keeping windows closed helps minimize drag.

• A. Depends on weather
• B. It depends on speed
• C. True
• D. False

Answer: (C)

Wind resistance comes from how air flows around the car. When windows are closed, air can move smoothly around the vehicle, producing less turbulence and smaller drag. Opening windows disrupts that smooth flow, creates more turbulence and vortices, and increases the cross-sectional area affected by moving air, which raises drag. So keeping windows closed helps minimize wind resistance, making the statement true.

Weather and speed don’t change this basic aerodynamic effect in a way that would make the statement false; weather isn’t the deciding factor, and while drag grows with speed, the act of having windows open still increases drag at typical driving speeds.