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This explains flight paths very well.

We may not have a clear understanding of exactly what gravity is other than to say it is a property of mass. That is true in both Newtonian and General Relativity. But we have a very clear understanding of how gravity interacts with objects. You cannot reasonably say that we do not...

So you have no idea what constitutes proof of gravity. How can you possibly provide compelling evidence for your position if you do not understand your own arguments? The theory of gravity explains and accurately models what we observe in world around us. All you have is that density makes...

What are expecting in the way of proof? We can use the Theory of Gravity to predict where a projectile will land. We can use it along with your density to calculate the force you exert on the ground: your weight. We can use to predict the orbits of planets, put satellites into orbit and to...

Proof please.

Yes. If you google Apollo 17 there are some great pictures of the earth taken from the moon. Looks nothing like the flat earth models.

Interesting claim. Can you prove that every picture of the Earth is a composite? Your claim, you back it up.

That is correct. The gravitational attraction between the Earth and the Moon keeps the moon in orbit. Yet the force of lift generated by the wings of the bird is sufficient to counteract gravity.

Centripetal force. I posted a short video explaining this a couple of pages ago. Gravity is a fairly weak force.

What is weight? What is responsible for enforcing the law of, "What goes up must come down?"

In Newtonian physcs, gravity is the attraction between two objects. They accelerate towards each other.

Pray tell, what causes an object to fall back to Earth?

Which model would you like to use? Newtonian or General Relativity? Both work. Newtonian is usually easier to work with and it did put men on the moon and get them back. General Relativity will also work but it is more complex, harder to work with for near earth effects. Either way, when I...

Yeah, but the temptation to needle you a bit was overwhelming.

I think I understand now why you can't understand how buildings collapse.

One other thing Dave, the effects of gravity fall off at the rate of 1/r^2 meaning that if you move away from a planet by a factor of 2, the effects of gravity are reduced by a factor of 4. So the farther away you are from an object the less the gravity of that object effects you.

Because gravity is not the only force in the universe. There is a force known as centripetal force that can counteract gravity. Take a bucket of water and turn it upside down. What happens? The water falls to the ground. Now take that same bucket of water and tie a rope to the handle. Spin...

Interestingly, your density did not change much, but your total volume did. Since density is mass per unit volume, That density stays roughly the same but you changed your volume so your weight changed. Why? well, weight is a force, f=ma. Force is mass time acceleration. We know you have...

I have made my point. My point was that your explanation that density accounts for the weight of things is wrong. You cannot explain to us why your theory of density does not explain why two people with the same density but different heights have different weights. The point is Dave that your...

You need to answer my question to get at what gravity is. Why do two people with the same density have different weights? What explains the difference?