Originally posted by esecallum
you have all evaded the point.
Excuse me? I'm sorry to have to be like this, but you've completely evaded the point. Not only are you using physics that don't hold water (you can
move in 1 direction. You can move in 2 or 3 dimensions, but there's only one resultant direction.), but you're completely missing the point that
I've just directly addressed the first idea without using the evidence you think you've successfully refuted!
So, here's what I'm going to do. I'm going to go after the point you've just made, and I hope that it'll show you the truth, because if it
doesn't I probably won't have further patience to deal with your idea.
An object may possess ONE velocity. You get one direction and one magnitude (Of course, you could say this in different ways. Example: you could be
going 25 miles per hour EAST or (negative) -25 miles per hour WEST. But they're still the same direction). This is all. The direction is a RESULTANT.
It is a SINGLE direction. You're absolutely right, however, that it does have X Y and Z in it. However, these are COMPONENTS. You CAN be going 20 mph
East, 25 mph North, and 15 mph Down. But if you are doing them all at the same time, you have moved along the RESULTANT.
To illustrate this. Go to a corner of a room and run along the wall to the other corner. Can you feel the wind? It's coming from the front, correct?
There you go. So now, according to your thoughts, this would have to be one of the Axes. Let's say, for example, that it was the X axis, and that the
wall perpendicular to that was the Y axis. If your theory were correct, you could run from a corner DIAGONALLY and would feel two different winds
pushing at your face. Seriously. Try it.
Doesn't work, does it? This is because you're moving along the resultant vector. You have one direction, and one magnitude. This is the definition
of a vector. Now, measurement-wise, you would be ABLE to say that you're moving at two different speeds, X and Y. But in order to feel two different
winds, you'd have to have two different yous (scary concept) since you'd have to move in each direction SEPARATELY but at the SAME TIME. The only
way to move in two different dimensions at the same time is to move in a direction between the two.
What I'd like to put forth for you is a different sort of coordinate plane. It appears that you're thinking in terms of Cartesian coordinates, X, Y,
and Z. It's very useful, but can be mixed up with real life. If you want to see how things will work in the air, I would like to direct you to the
Polar Coordinate System. In this system, you start from a single point. To define a line (which could represent movement) you supply an angle
(direction) and a length (magnitude). These are vectors. Ultimately, this is a better way to see the movement of an aircraft (without wind, of course)
since you don't have to deal with the differing X-Y-Z aspects of it all.
Hope this has been some help.