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kaikalii
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What happens to objects (of any material, density, mass, etc) at both the macroscopic and atomic scales when under the effects of very high accelerations, say, 100 g's? 1000 g's? 1000000?
A large gravitational field is actually a good example why coordinate acceleration doesn't necessarily put a lot of stress on objects. A large gravitational field is locally uniform, so it accelerates objects without causing internal stresses. It's not the amount of net acceleration, but how non-uniform the applied forces are that determines how much stresses there will be.Simon Bridge said:Depends on the circumstances ... high accelerations generally put a lot of stress on macroscopic objects.
Think in terms of the effects of a very large gravitational field.
A.T. said:A large gravitational field is actually a good example why coordinate acceleration doesn't necessarily put a lot of stress on objects. A large gravitational field is locally uniform, so it accelerates objects without causing internal stresses. It's not the amount of net acceleration, but how non-uniform the applied forces are that determines how much stresses there will be.
kaikalii said:But wouldn't large amounts of non-uniform acceleration still have certain effects? I'm pretty sure a human would not be doing too well in a rocket accelerating at 980 m/s^2. But are you saying that the rocket itself would be fine structurally, as it's acceleration is uniform?
No. I was talking about the effects of an uniform gravitational field (constant over space). You are confusing it with uniform acceleration (constant over time). A uniform gravitational field doesn't cause internal stresses, regardless how much uniform acceleration it causes.kaikalii said:But are you saying that the rocket itself would be fine structurally, as it's acceleration is uniform?
The beam bends because the support forces are non-uniform.Simon Bridge said:@A.T.: Put a beam between two supports... what is the effect of the gravitational field strength on how much the beam bends?
But the gravitational field is constant! So you are saying that when the support forces are not uniform, you can[/i get stresses in a uniform gravitational field? i.e. the amount of stress depends, in combination, upon the geometry of the object(s)/system and the strength of gravity?The beam bends because the support forces are non-uniform.
Not "localized" : "local".magaszag said:Why use localised gravitation fields of large energy patterns?
Can a force have "structure" to keep the integrity of?Seems to me that is this force weakest of all to keep structural integrity...
That's is self contradictory. In a stronger gravitational field the non-uniform support forces on a static beam must be stronger too.Simon Bridge said:All other things being equal, the beam experiences more stress in a stronger gravitational field?
It bends more if the non-uniform forces are greater. That's what I'm saying.Simon Bridge said:So it does not bend more in a stronger field? Is that what you are saying?
(emph added)Depends on the circumstances ... high accelerations generally put a lot of stress on macroscopic objects.
Maybe I misunderstood what acceleration you mean in regards to the large gravitational field. I was explicitly talking about the coordinate acceleration of a free falling object. This acceleration doesn't cause any stresses.Simon Bridge said:Is it merely that you wanted to point out that there are other factors in play besides the acceleration?
Ahh there you go, all cleared up :) Free fall is a special case of acceleration under gravity.A.T. said:Maybe I misunderstood what acceleration you mean in regards to the large gravitational field. I was explicitly talking about the coordinate acceleration of a free falling object. This acceleration doesn't cause any stresses.
kaikalii said:But wouldn't large amounts of non-uniform acceleration still have certain effects? I'm pretty sure a human would not be doing too well in a rocket accelerating at 980 m/s^2. But are you saying that the rocket itself would be fine structurally, as it's acceleration is uniform?
As A.T. has been getting at, if the entire rocket (and the person inside) are all undergoing a huge uniform acceleration in space, then the person would not feel anything, and the rocket would be structurally fine.kaikalii said:*uniform
kaikalii said:What happens to objects (of any material, density, mass, etc) at both the macroscopic and atomic scales when under the effects of very high accelerations, say, 100 g's? 1000 g's? 1000000?
Very high accelerations can cause objects to experience significant changes in velocity and direction, potentially resulting in damage or destruction of the object.
The effects of very high accelerations can vary depending on the material, shape, and size of the object. In general, smaller and more rigid objects are more likely to withstand high accelerations compared to larger and more flexible objects.
Yes, very high accelerations can be harmful to living organisms, causing injuries or even death. This is especially true for delicate organisms like humans and animals.
The ability of an object to withstand high accelerations depends on its structural integrity, mass, and the duration of the acceleration. Objects with stronger and more rigid structures, as well as higher mass, can typically withstand higher accelerations for longer periods.
Scientists use specialized equipment like centrifuges and drop towers to simulate very high accelerations and observe their effects on different types of objects. They also use mathematical models and computer simulations to predict how objects will behave under extreme accelerations.