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Originally posted by rush969
Let´s try this example:
You throw a bullet as fast as you can to hit me with it right between the eyes. It will hurt, yes, it will leave a mark, yes, will it go through my skin and bones? NO. Will I collapse? NO.
Fire that same bullet from a gun, and I´ll shurely collapse and die!!
So what point have we learned here? It´s not the bullet that kills you, it´s the speed at which it´s coming at you that does the damage.
Originally posted by Calatrava
"So what point have we learned here?"
Nothing. Your example is ludicrous. We are not made of steel.
/quote]
Well, then I would have to say your example of the mice hitting a man at 0.00014 km/hr is not only ludicrous but RIDICULOUS too!!
The point is quite simple really. There´s a thing called "momentum" which is something that a given mass aquires as you give it speed on it´s way through the air. If this mass aquires more speed, the biger it´s momentum becomes and the effect this will have in the object that it hits will be very different depending on that relationship between mass and speed.
And YES, the planes can go into the building, just like they did. Only thing is, you are trying to describe it as if nothing happened to the plane. It may appear like nothing is happening as the plane is going in, but it is being TOTALLY disintegrated by the structure of the building, which also suffers great damage because of the momentum of the mass of the plane.
Originally posted by ANOK
reply to post by rush969
The thing you're missing is that regardless of what speed the objects that collide are moving the forces exerted on each object is equal.
So the faster the plane is moving the more force is exerted on both the plane and the building, equally.
AGREE.- That´s why the plane disintegrated and the buildings structure was damaged to the core.
The reason the bullet doesn't go through you when you just throw it is there is not enough momentum, as you correctly said, but it's not just momentum working when its shot at you. A lead bullet has more mass than your body does, your body, in your example, should be the plane and the bullet the building.
Do not agree.- (I don´t think a lead bullet has more mass than my body or yours, although I believe that´s not important in this issue.) In my example, the bullet is the plane.
You also can't have the plane being destroyed by the buildings columns, AND have the columns destroyed by the plane. Newtons physics explains this, basic physics 101.
Do not agree.- This is exactly what we see. The plane is completely destroyed by the building with it´s impact into it, but the building is NOT destroyed by the plane. Some members of the outer structure are damaged, punctured, split, fractured, and some members of the inner core structure are damaged, but the building remains standing for quite a while.
Originally posted by rush969
Do not agree.- This is exactly what we see.
in physics, quantitative measure of inertia, a fundamental property of all matter. It is, in effect, the resistance that a body of matter offers to a change in its speed or position upon the application of a force. The greater the mass of a body, the smaller the change produced by an applied force. By international agreement the standard unit of mass, with which the masses of all other objects are compared, is a platinum-iridium cylinder of one kilogram. This unit is commonly called the International Prototype Kilogram and is kept at the International Bureau of Weights and Measures in Sèvres, France. In countries that continue to favour the English system of measurement over the International System of Units (SI), the unit of mass is the slug, a mass whose weight at sea level is 32.17 pounds.
The plane is completely destroyed by the building with it´s impact into it, but the building is NOT destroyed by the plane. Some members of the outer structure are damaged, punctured, split, fractured, and some members of the inner core structure are damaged, but the building remains standing for quite a while.
Originally posted by rush969
How can a bird which is basically soft skin, brittle small light bones, and liquids consisting of water and blood, cause damage to a jet engine, which is like a giant blender, and is made with some of the strongest metals?....
Originally posted by ANOK
So where did ya go? It's not like you guys to be shy to post a reply.
You still trying to figure out the maths?
Here's another question, why does Greening have to make assumptions for his 'paper' to make sense? I thought science didn't rely on assumptions, only testable facts?
The NIST report is incomplete, so why aren't you guys asking why?
If you think ignoring me is going to help you, forget it, I'll be in every thread you dare to even whisper in, just to remind you...
Originally posted by ANOK
Edit; of course momentum has an effect on the outcome, but again remember that the forces are still equal on both objects when they collide so the object with less mass will still fail first.
The Law of Momentum Conservation
The Law of Action-Reaction (Revisited)
A collision is an interaction between two objects which have made contact (usually) with each other. As in any interaction, a collision results in a force being applied to the two colliding objects. Such collisions are governed by Newton's laws of motion. In the second unit of The Physics Classroom, Newton's third law of motion was introduced and discussed. It was said that...
... in every interaction, there is a pair of forces acting on the two interacting objects. The size of the force on the first object equals the size of the force on the second object. The direction of the force on the first object is opposite to the direction of the force on the second object. Forces always come in pairs - equal and opposite action-reaction force pairs.
Originally posted by rush969
ABSOLUTELY CORRECT: That´s why you see the building damaged but not destroyed. And it remains standing for quite a while. The plane however is destroyed in fractions of a second.