Question What is the name of this force acting on a fly?

Jul 1, 2025
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When riding in a taxi, you are moving at a certain speed equal to the moving vehicle or train etc. if there is a fly present in that vehicle it is also in a way flying at that speed as well, whether sitting on the vehicle’s window, wall or on you. Heck it could even be flying back and forth in the vehicle while it’s moving in high speeds.

What is the name of that force that moves the fly along with the vehicle? Because, if you were to open the window or door and the fly exits the moving vehicle, it would definitely get left behind.

I believe the same force exists within the theorized Oort cloud covering our solar system and the Oort cloud is that vehicle travelling around the Milky Way every 280Million or so years per cycle. For this reason, should we succeed in reaching the edge of the theoretical Oort cloud and if we exit the cloud, immediately that vessel we are traveling in, whether a rocket or spacecraft, we would get stranded in interstellar space until the Oort cloud makes that 280Million years cycle but we would be long dead by then, for this reason I fear we are only limited to exploring our own Solar System and not beyond. Meaning we as humans are likely never to achieve interstellar travel, at least not within the next 50 000 years. Voyager 1 just made it to the inner edge of the cloud after so long.

Not to lose you though, what is the name of this force acting on the fly in a moving vessel, the same force possibly acting on our solar system as we move along the galaxy?
 

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