HOW DOES GRAVITY WORK?
There are two forces in nature that we experience every day: gravity and magnetism. You may have magnets on your refrigerator, and you know that a magnet will attract a refrigerator with a certain amount of force. The force depends on the strength of the magnet and the distance between the magnet and the metal. You also know that magnets have two poles — north and south. Either pole will attract iron or steel equally well, north will attract south, and like poles will repel one another.Gravity is the other common force. Newton was the first person to study it seriously, and he came up with the law of universal gravitation: Each particle of matter attracts every other particle with a force which is directly proportional to the product of their masses and inversely proportional to the square of the distance between
Gravity is the force of attraction between objects. Every object with mass has a gravitational pull, it is just normally too small to be noticed – but even you have a pull on the objects around you. As it is a very weak force, it needs a massive body such as the earth to have a substantial pull, though you overcome this easily when you jump, before being pulled back to the Earth again. It is not known how gravity is carried, over a graviton has been postulated as carrying gravity. Interestingly, if the sun were to disappear it would take us 8 minutes to feel the gravitational difference just like it would take us 8 minutes to see the light disappear.
Every time you jump, you experience gravity. It pulls you back down to the ground. Without gravity, you’d float off into the atmosphere — along with all of the other matter on Earth. You see gravity at work any time you drop a book, step on a scale or toss a ball up into the air. It’s such a constant presence in our lives, we seldom marvel at the mystery of it — but even with several well-received theories out there attempting to explain why a book falls to the ground (and at the same rate as a pebble or a couch, at that), they’re still just theories. The mystery of gravity’s pull is pretty much intact. So what do we know about gravity? We know that it causes any two objects in the universe to be drawn to one another. We know that gravity assisted in forming the universe, that it keeps the moon in orbit around the Earth, and that it can be harnessed for more mundane applications like
