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Originally Posted by Flint
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Originally Posted by Happy Monkey
No, because wheel speed is identical to the speed of the plane relative to the treadmill. They are the same thing.
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The question does not reference wheel speed, but plane speed. The question is what the plane speed is measured relative to. You can get two different answers, depending on what plane speed is measure relative to. |
I didn't say it did. I said that wheel speed is identical to the speed of the plane relative to the treadmill.
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Originally Posted by Happy Monkey
But the speed of the plane relative to the treadmill does not affect the speed of the plane relative to the ground.
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The speed of the plane can be desribed two different ways. They aren't exchangable.
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Again, I didn't say they were. I said that they were different, and that the latter doesn't affect the former.
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Quote:
Originally Posted by Happy Monkey
If the engine is going, then the plane moves forward relative to the ground.
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The plane isn't on the ground. It's on the treadmill. The treadmill either cancels it’s relative motion, or has no effect whatsoever.
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It cannot cancel the relative motion, because it doesn't apply any force to the plane, just the wheel. The only force pushing the plane is the engine, the engine acts relative to the air, which is not affected by the treadmill. Therefore the plane moves forward relative to the ground.
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The question doesn’t include wheel speed as a variable, only plane speed and treadmill speed. No kidding.
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The question doesn’t include wheel speed as a variable, only plane speed and treadmill speed.
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No, the treadmill stated in the question only cares about the plane speed, never the wheel speed.
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You say that a lot, but it is irrelevant. Wheel speed is equal to the speed of the plane relative to the treadmill. They are identical.