What is Gravity

This is Lawrence Krauss describing the works of string theorist Neil Turok et al.

,

where:

• F is the force between the masses,
• G is the gravitational constant,
• m₁ is the first mass,
• m₂ is the second mass, and
• r is the distance between the ma

GA Lyn

Yeah, that was all fine until Albert Einstein got hold of it......

Actually, what is in post #3 is still almost completely correct.

The question is, what causes that "behavior"--that is more of what Einstein addressed, and is still uncertain today, imho.

Is there a graviton? (Do I have the right name?) Or is space curved?

Something I haven't resolved in my own mind is whether if the graviton is proven to exist, will that mean that curved space as an explanation is disproved. I sort of think not, but it gives me a headache to think about (and it's currenly on my back burner).

Think of gravity as a kind of mono-pole force and magnetism or electromagnetism as a di-pole force. Gravity has a slight effect on light (a form of electromagnetic energy) but the opposite is not known to have any interaction.

The size of the monopole is determined by its mass. And all monopoles attract each other. Convert some of that mass into its alternate form energy and you have a big bang as the energy is dissipated.

Note also that we manipulate electric and magnetic fields all the time, but it takes specific materials to make that happen. Figure out what manipulates gravity and you will be very rich indeed! Like any monopole, gravity has vectors parallel to the center of mass at any point on it, else the people on the bottom of the planet would fall off.

Is gravity linked to Space-Time? Acceleration to, from, or around an object feels like gravity but it isn't. It involves vectors of force (acceleration is a change in the relative motion of some object). When a space craft orbits a planet, it is constantly changing its direction of travel. At the right speed for a given radial distance, you can obtain a "zero G" acceleration toward the planet and experience extended weightlessness, but this is only a case of balance between gravity and your acceleration through space-time.

Gravity is always present any time mass is present. Motion requires changes in space-time of some mass. Gravity appears to be static (i.e. stationary), spherically distributed, and measurable. Static charge is a stationary electric field, that can be attracted to some mass with the opposite charge or even something with no charge,that is, until it is discharged. When a static charge is neutralized, a current flow dissipates the charges and the force is gone. If you could deflect the gravitational vectors that act on you away from your center of mass, you would rise away from the surface of the earth. You'd better be able to turn that device off or you will never get it patented!

But a good question though i have in mind long time ago.should 9.81m/sec2 the g for Earth. What if the revolution of the earth decrease to 10% would that affect g?

Nope! Gravity depends on mass, only.

Hmm, well, mass does depend on speed, but a change in mass due to speed only becomes significant at significant fractions at the speed of light. So maybe there is some change but so small that it would be very, very, very, ..., difficult to measure.

gravity is a difference of potential.

it appears to be mass/speed related...but the difference of potential that 'causes' it (and matter/energy equally) ... is Time itself... a difference of potential of time is energy... and subsequently matter...and inherently, gravity.

imho.

chris