NEWTON'S LAW OF UNIVERSAL GRAVITATION

I now realize that I’ve already mentioned in my previous posts the law of gravity that was discovered and mathematically explained by Isaac Newton in 1650 and it’s universal because it explains the positions of all the planets in our universe and to me is the simple proof of the existence of God.

Newton discovered the Law of Gravity. But what is it? Is it as simple as, "Things tend to fall downward?" Of course people know that things fall downward, ever since there were people. Newton never mentioned being hit on the head by an apple, but he did say that he saw an apple fall. Maybe the moon was in the sky at the time, maybe not. But when Newton saw the apple fall, and thought about it, his great insight was that he saw that the same thing that caused the apple to fall (gravity) is what holds the moon in its orbit.

So this is how he put it:

Along with his laws of motion, Newton's law of gravity led directly to mathematical explanations of Galileo's falling object experiments and the Laws of Kepler concerning the motions of the planets. Newton's Law of Universal Gravitation states:

F=Gm1m2/d2

F is the force of gravity, G is a constant (the Gravitational Constant) which can be measured, m1 and m2 are the masses of the two objects (earth and apple or earth and moon, in), and “d” is the distance between them. You can see that gravity follows the famous inverse square law that many physical phenomena follow.

One consequence of all this is that everything attracts everything else with gravitational forces. The earth attracts the apple and the apple attracts the earth with the same force. The apple is the one that moves noticeably because it is so much lighter (and easier to move) than the earth. The earth and a ten pound weight are attracted to each other with a force of exactly ten pounds. In fact, that is the definition of weight, the force of gravitational attraction. Everything attracts everything, hence the "universal" in the name of Newton's law. And the law holds way out as far as telescopes can see; it is truly universal.

Einstein's General Relativity is the more recent, more accurate, law of gravity. Has Newton's law of gravity been thrown onto the trash? Is it wrong? No, it is a very valuable first approximation which is good enough for almost all purposes. And Newton's law is valuable for comparison with and understanding Einstein's version. And Einstein's version is too complicated for most purposes. In other words (mine) I believe that nature (God) gave a position of dominance to the USA and its economy that even if now out of balance the universal law of gravity is going to soon reposition in its balanced state, much like my wife and mother of my treasures will soon reposition herself where nature (and me) put her many years ago. Following Newton’s law, I’m attracted to Michele as much as she’s attracted to me and to force out of position such a delicate balance is as dangerous as the moon losing its balance of attraction with earth = disaster/end of the world.

http://www.physicsclassroom.com/class/circles/u6l3c.cfm