Fly in My Truck: Wondering Why Fly is Flying Around Cab?

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A fly can fly around inside a moving truck due to the difference in air pressure and airflow dynamics within the cab. When the truck is moving at a constant speed, the air inside the cab is relatively still compared to the outside air, allowing the fly to navigate freely. Opening the windows changes the airflow, which can push the fly out of the vehicle. The discussion also draws a parallel to the experience of being on a train, where passengers do not feel pushed back despite the speed. Overall, the fly's ability to maneuver inside the truck is influenced by the enclosed environment and airflow conditions.
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hey i had a question... my friends and i were pondering... there was a fly in my cab of my truck and we were doing like 40 mph with the windows up and the fly was flying around in the cab...

i was wondering why the fly wasnt being pushed back towards the back of the truck and why it was able to fly around the cab of my truck
 
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the air was moving forward too, which pushes the fly forward. If you open your windows, and the rear cab window, itll probably get pushed out.
 
thank you sir
 
Yes, you've been on a train before. When moving at constant speed, you're not crushed against the back wall.
 
I'm thinking that having a fly in your truck is more comfortable than the other way around.
 
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