I was driving in a cabriolet car at the speed of 80mph, while a fly flew in and out of the frame of the car. My question is, How can the fly leave the frame and get back in? Is it possible that it flies at 80mph?
closed as unclear what you're asking by Nic, Abhimanyu Pallavi Sudhir, Brandon Enright, jinawee, user10851 Feb 6 '14 at 16:06
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The fly is carried away within the turbulent motion of the air the moving car generates. Therefore, it stays close to the car (for a short while) and returns without actually having to fly at 80 mph. -> Answer to your second question: No!
A google search for "turbulence around car/obstacle/plane" gives colourful pictures of the wind field around moving objects.