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Author Topic: The effect of gravity on a mass  (Read 1632 times)

Offline jeffreyH

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The effect of gravity on a mass
« on: 06/09/2014 16:27:47 »
In order for there to be no experience of a force acting upon a body in free fall in a gravitational field all particles in the falling mass must be acted upon simultaneously by  gravity. In a virtual particle model this requires an unrestricted permeability of matter by interacting forces. This is regardless of the effects of electromagnetic interactions. This would of necessity have to be considered a consequence of those electromagnetic interactions. The interactions of both the positive and negative electromagnetic fields would be the major reason for gravitational attraction.


 

Offline jeffreyH

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Re: The effect of gravity on a mass
« Reply #1 on: 06/09/2014 17:25:21 »
Consideration needs to be taken of the history of electromagnetic mass.

http://en.wikipedia.org/wiki/Electromagnetic_mass
 

Offline PmbPhy

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Re: The effect of gravity on a mass
« Reply #2 on: 07/09/2014 03:26:23 »
Quote from: jeffreyH
In order for there to be no experience of a force acting upon a body in free fall in a gravitational field all particles in the falling mass must be acted upon simultaneously by  gravity.
It's a common misconception to think that all bodies fall at the same rate in a curved spacetime. That's only true for point particles. When there is a body present having a finite extent then there are different forces acting on different parts of the body meaning that the acceleration of the body depends on contributions from all those forces.
 

Offline jeffreyH

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Re: The effect of gravity on a mass
« Reply #3 on: 07/09/2014 16:23:05 »
Quote from: jeffreyH
In order for there to be no experience of a force acting upon a body in free fall in a gravitational field all particles in the falling mass must be acted upon simultaneously by  gravity.
It's a common misconception to think that all bodies fall at the same rate in a curved spacetime. That's only true for point particles. When there is a body present having a finite extent then there are different forces acting on different parts of the body meaning that the acceleration of the body depends on contributions from all those forces.

I know it's a simplification. I am trying to reduce the complexity. Whether that is the proper thing to do is a matter for debate. Even the fact of holding an object in your hand before dropping it to the ground involves the force applied via muscles in order to keep the object at a particular height.
 

Offline alancalverd

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Re: The effect of gravity on a mass
« Reply #4 on: 07/09/2014 23:18:02 »
Back to front reasoning. "In order for there to be no experience of a force...." is a condition which requires a nonuniform gravitational field. The concept of spaghettification under extreme gravitational attraction is all about significant forces acting throughout a finite body.

You can't "reduce the complexity" by ignoring the laws of physics or assuming an arbitrary condition to hold true under all fields: you'll just confuse yourself.
 

Offline jeffreyH

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Re: The effect of gravity on a mass
« Reply #5 on: 08/09/2014 00:55:24 »
Back to front reasoning. "In order for there to be no experience of a force...." is a condition which requires a nonuniform gravitational field. The concept of spaghettification under extreme gravitational attraction is all about significant forces acting throughout a finite body.

You can't "reduce the complexity" by ignoring the laws of physics or assuming an arbitrary condition to hold true under all fields: you'll just confuse yourself.

I understand the complexities involved all too well. I take everyones comments on board and do appreciate the fact that people take the trouble to respond.
 

Offline jeffreyH

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Re: The effect of gravity on a mass
« Reply #6 on: 08/09/2014 00:57:24 »
BTW I did not say I was in favour of this point of view of gravitational effects.
 

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Re: The effect of gravity on a mass
« Reply #6 on: 08/09/2014 00:57:24 »

 

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