Quote:
Originally posted by Mobycat:
Quote:
Originally posted by XPLORx4:
[b]
Quote:
Originally posted by Mobycat:
[b]So someone answer this ignored comment:

If the engines are off, and if there was NO friction, and that conveyor belt moved, the plane shouldn't budge - it will just have rolling wheels.
That's a correct statement if you mean there's no friction in the wheel bearings. (You need friction between the tires and conveyor, otherwise the tires wouldn't start rolling).[/b]
Yes, in the wheel bearings.

So, if there is friction, the plane will roll backwards?

Can the plane match the force with its engines?

What if it can't do anything *beyond* matching it?[/b]
Why is it that this scenario seems to be possible UNTIL you get to the last question?

What magic appears to make the plane suddenly overcome the friction? When it can ONLY match it? (Which is what the conveyor belt is doing?)
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"Nature has constituted utility to man the standard and test of virtue. Men living in different countries, under different circumstances, different habits and regimens, may have different utilities; the same act, therefore, may be useful and consequently virtuous in one country which is injurious and vicious in another differently circumstanced" - Thomas Jefferson, moral relativist