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I have read many ppl writing that "gravity repels". Howz that possible?
the blob inc said:the universe is a big place. now concidering there is alot of matter in general in space, if gravity was a push you could look at it as the sum of the universe pushing down on you/ and vise versa for push gravity, which would have an effect of pulling you down vs the pulling force of the sum of the universe. that being all said look at it as high pressure/low pressure, in either situation you would get the same effect depending on the localized and de-localized variables of your possition and location.
here is a good analogy:
ANALOGIES (not meant to be unkind)
The team of medieval physicists stepped out of the time machine and began to examine the strange, new device fastened to the window. They had never before seen a suction cup, so with great enthusiasm, they began to experiment by pulling this mysterious device off the window, then reattaching it.
"The glass must attract the device" remarked one of them. They all nodded in agreement.
Next, they found a smaller piece of glass and discovered that the suction cup had the gripping power to suspend it. This new revelation prompted another physicist to remark, "The device must also attract the glass!" Having no real reason to seek a better explanation than this for their observations, the team of medieval physicists unanimously concurred, and a new theory was born: "The device and the glass are attracted one to another, this being a characteristic of space!"
My comparison to medieval science is not an insult to physicists. I merely wish to emphasize mankind's present level of ignorance of the mechanics of our universe. We now know that the suction cup in this example is held to the glass by air pressure. The invisible molecules that make up air constantly bombard the surfaces of the glass and the suction cup. The difference in pressure cause, what appears to be, an attraction. My gravitational hypothesis is somewhat similar. All I ask of you, the reader, is to keep an open, yet discerning mind.
shaan_aragorn said:I have read many ppl writing that "gravity repels". Howz that possible?
It isn't. Gravity is a purely attractive force. I don't even think that the theoretical 'negative matter' would be gravitationally repulsive, since gravity is a characteristic of space-time rather than being inherent to matter. Someone should check me on that, though.
If it is true that for every action there is an equal and opposite reaction, than wouldn't it be obvious that gravity should be able to both attract(pull) and repel (push
No. For the same reason you can't assign any other opposite-but-irrelevant words to them, such as 'good' and 'evil'.If it is true that for every action there is an equal and opposite reaction, than wouldn't it be obvious that gravity should be able to both attract(pull) and repel (push
I have read many ppl writing that "gravity repels". Howz that possible?
Wild, unfounded speculation will not help answer the OP's question.moreover the blackholes have wormholes that open in another universe wher these worm holes would be the antiblackholes.
Gravitational slingshot also gives illusion of a mysterious repulsive force. When a space probe approaches a giant planet like Jupiter on a certain tangent, it swings around and gains incredible speed. Upon leaving the planet, one would assume the gravity would slow down the space probe by pulling it inwards, but that is not true. The probe leaves the system at a higher speed as if it was repulsed.
It's only mysterious if you're not paying atttention.Gravitational slingshot also gives illusion of a mysterious repulsive force.
It most certainly is true. It pulls every bit as much when the probe is receding as when it's approaching.When a space probe approaches a giant planet like Jupiter on a certain tangent, it swings around and gains incredible speed. Upon leaving the planet, one would assume the gravity would slow down the space probe by pulling it inwards, but that is not true.
No, it leaves the system at a higher speed as if it traded some momentum with the planet, which is now moving at a slightly slower pace through the solar system.The probe leaves the system at a higher speed as if it was repulsed.
No, it leaves the system at a higher speed as if it traded some momentum with the planet, which is now moving at a slightly slower pace through the solar system.
Then isn't this just misleading?I was just alluding to the fact that gravitational slingshot can appear to be an effect of a gravitational repulsion. It is well understand, and it's a consequence of conversation of momentum.
Then isn't this just misleading?
But why would we offer hypotheses born of ignorance? They come here for answers. :uhh:I think it's a plausible hypothesis that gravity can be repulsive if you didn't understand classical mechanics. Once you introduce CM, the hypothesis is proven wrong.
But why would we offer hypotheses born of ignorance?
So can gravity repel ='[?
I thought at 80%plank high density it could? Or something like that =]
Wild, unfounded speculation will not help answer the OP's question.
Why? Does it introduce observational evidence that the rest of the world is unaware of, that supports the proposed theory?If you feel mine is a speculation and its unfounded,look for the book, Physics for Scientist and Engineers by Paul A. Tipler and read on the chapter, evolution of the universe and about the lepton era. Be good guy