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

[AdamasPrime]

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?

 

[Pogo]

The fly has no idea it is inside the taxi. At that point, the taxi is its world and the physical environment is the air moving along with the taxi, the fly’s wings interacting with that air. If the fly exits the taxi, it very quickly slows down to the speed of the air it is now in, it doesn’t have afterburners to keep up with the taxi.
That being said, a spacecraft in LEO is subject to the gravity of primarily the Earth. As it does an escape burn, it will slowly lose Earth’s gravity and gain the Sun’s gravity. As it leaves the Solar System, it will slowly lose the Sun’s gravity and gain the galactic gravity. But, the changeover is very slow and subtle, not noticeable unless you measure your motion frequently.
No, you will not suddenly fly off to wherever at the heliopause, like the fly, totally different set of forces.

 

[AdamasPrime]

In other words, it’s possible that once you exit the Oort cloud in a spacecraft, you are likely going to see the entire cloud encompassing the solar system as it “slowly” drifts away and you slowly lose it’s gravity? Kinda like holding on to a moving car while on a skateboard and you let go and watch the car drive off as you enter the actual galaxy’s gravity. I guess i’m trying to figure whether the whole cloud is circling the galaxy with the SS inside or of its just the planets and the sun doing the circling.

 

[billslugg]

The Oort cloud is gravitationally bound to the Sun and all the Oort cloud objects orbit the Sun. Wherever the Sun goes, so does the Oort cloud. If an Oort cloud object happens to stray over the half way point to the nearest star then it will become bound to that star.