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Veida wrote:I'm afraid you are wrong. The Earth's rotation has nothing to do with the tidal forces, other than moving the Earth so that they move around on the surface. It the Earth would not rotate at all around its axis, so that an Earth day would be the same as an Earth year, the tidal forces would be the same: a maximum in the middle of the day, and a maximum at the middle of the night.
I do know that this is a common misconception. Nevertheless, it is a misconception.
Veida wrote:That's completely irrelevant.
DavidMcC wrote:If you accept that "weight" = "contact force with the earth" when in steady contact with it, then you must include dynamic effects on it.
DavidMcC wrote:You don't say!
You are as confused as Veida is, it seems.
If we were in free fall around the earth, you might have a point.
DavidMcC wrote:It isn't quite that simple. Were it not for the earth's spin about its own axis, the night time effect would be to increase our weight, but, as it is, conservation of angular momentum changes that, as with the tides.
Veida wrote:DavidMcC wrote:If you accept that "weight" = "contact force with the earth" when in steady contact with it, then you must include dynamic effects on it.
Even if I did, the rotation of the Earth around its own axis does not produce any dynamic effect on weight (as you define it). It's irrelevant to the question at hand.
Nonsense. Learn some Newtonian physics.
Even then it's still unconnected with tidal force.
Wow, that's a quality quotemine.DavidMcC wrote:Nonsense. Learn some Newtonian physics.
Veida wrote:
No. This is simply not correct.
I don't know where you went wrong. If you couid show the math leading to this conclusion perhaps we can sort it out for you?
Veida wrote:
No. This is simply not correct.
I don't know where you went wrong. If you couid show the math leading to this conclusion perhaps we can sort it out for you?
DavidMcC wrote:Veida wrote:I don't know where you went wrong. If you couid show the math leading to this conclusion perhaps we can sort it out for you?
You will not be able to sort it out for me, because I am not wrong. All you need to realise is that the force of gravity is a vector, and that we are not usually in free-fall around the earth (in which case we would be weightless).
Veida wrote:DavidMcC wrote:Veida wrote:I don't know where you went wrong. If you couid show the math leading to this conclusion perhaps we can sort it out for you?
You will not be able to sort it out for me, because I am not wrong. All you need to realise is that the force of gravity is a vector, and that we are not usually in free-fall around the earth (in which case we would be weightless).
Yes, you are wrong.
I'm afraid I can't help you figure out where you went wrong unless you explain yourself a bit more.
Do you accept that the Earth and everything on it is in free fall in relation to the sun?
Veida wrote:You have no idea what I realize or not.
Next question: do you think that the discus is in free fall with regards to the discus trower, before he lets go of the discus?
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