The "Aeroplane on treadmill" conundrum...

[SkyHawk-N]

Originally Posted by High Wing Drifter

What about the other one I've seen doing the rounds:

If an aircraft is in flight and inside it, a bird is also in flight, does the aircraft feel the weight of the bird?

No

Originally Posted by distaff_beancounter

And If the aircraft is flying at, say, 500 kts and the bird has a max speed of 100 kts - will the bird manage to fly from the back to the front of the aircraft?

Yes

Originally Posted by TheKentishFledgling

If you're in a space craft (theoretically) travelling JUST under the speed of light, and you run from the back to the front of the spacecraft (enough to make up the difference from space craft speed to the speed of light), are you then travelling at the speed of light? What then happens if, while you are still running, the rocket accelerates to a speed GREATER than the speed of light....?

Nothing. Prove me wrong!