Can a Plane on a Treadmill Take Off?

"Kpi$LyLcEhRo" wrote in message
oups.com...
"Gary Drescher" wrote in message
...
"Kpi$LyLcEhRo" wrote in message
oups.com...
Actually this entire question and solution is about adding
and substracting velocity vectors and a perfect example of Einstein's
relativity theory.

No, this is strictly Galilean relativity (from four centuries ago);
Einstein's relativity has no bearing on this discussion.

I don't agree completely. But your right that Galilean blabla has to do
with this but [...]
So does Einstein! May I remind you of one of Einstein's
many mind experiments... The one about a train moving at a certain
speed, an observer inside the train walking to the front of the train
and an observer outside the train, standing still...

That's a classic thought experiment in support of Galilean relativity. Of
course Einstein was familiar with it, but it's part of a theory much older
than Einstein's.

Sure, it's all connected to eachother. Einstein didn't invent
everything you know, he just used the tools and perfected them.

Einstein invented quite a bit, including special and general relativity. But
those theories of relativity are not involved in the simple vector-addition
problem under discussion.

--Gary