Essay on the topic if there was no gravitational foce
Answers
Answer:
When I was young, I dreamed about traveling to space and enjoying the wonders of weightlessness. I wanted to eat bubbles of water and bounce off the ceiling. I planned to take a nap on the wall and then play a 360° game of leapfrog. And the back-flips!! Oh, how I dreamed of doing innumerable, flawless back-flips.
You see, I have never been particularly aerobatic (falling generally comes much easier to me), but in space, well, it seemed that anything is possible there. And if I’m being honest, I still dream about floating around among the stars. Sometimes, gravity seems like such a drag. But what if it didn’t exist? What if we all woke up one day and discovered that, suddenly, there was no more gravity?
Before we embark on this little thought experiment, first, a definition:
“Gravity is a force of attraction that exists between any two masses, any two bodies, any two particles. Gravity is not just the attraction between objects and the Earth. It is an attraction that exists between all objects, everywhere in the universe.”
Let’s say you are walking down the road beside a friend. Even though you may not be aware of it, there will be an incredibly slight gravitational attraction between the atoms in your body and the atoms in your friend’s. The same is obviously true for objects that are floating about in space. Really large objects that have a lot of mass (like planets) exist because matter is gravitationally attracted to other matter. In essence, gravity makes matter clump together; it forms the planets and stars and black holes…and everything else that makes life so terribly interesting.
Original image source: Li Wei
Original image source: Li Wei
At the most basic level: gravity is related to mass, which is related to matter. The more matter, the higher the mass; the higher the mass, the higher the gravitational pull. Gravity on Earth never changes because the mass of the Earth never changes. Essentially, huge chunks of our planet aren’t being ripped out from under our feet (which is, I think, generally a good thing). A change in mass great enough to result in a change in gravity isn’t going to happen anytime soon (thankfully, a large portion of our planet isn’t going to up and disappear).
But let’s ignore physics. Suppose that, one sunny day in May, the planet gives off a frightening “POP” and gravity….goes away. Obviously, everything would start floating. You would float; that chair that you are sitting in would float; the device that you are using to read this would float; the desk or table you’re using would float…everything (is what I’m getting at here), everything would float. This might sound like a bit of fun. But, unfortunately, we would lose one of our best friends: the Moon. Of course, Earth’s gravity is the only thing keeping the Moon in orbit. Without it, it would float off into space. Oh, and of course we’d all die.
Explanation:
Answer:
Gravity is one of those things we take completely for granted. And there are two things about it that we take for granted: the fact that it is always there, and the fact that it never changes. If the Earth's gravity were ever to change significantly, it would have a huge effect on nearly everything because so many things are designed around the current state of gravity.
Before looking at changes in gravity however, it is helpful to first understand what gravity is. Gravity is an attractive force between any two atoms. Let's say you take two golf balls and place them on a table. There will be an incredibly slight gravitational attraction between the atoms in those two golf balls. If you use two massive pieces of lead and some amazingly precise instruments, you can actually measure an infinitesimal attraction between them. It is only when you get an gigantic number of atoms together, as in the case of the planet Earth, that the force of gravitational attraction is significant.
The reason why gravity on Earth never changes is because the mass of the Earth never changes. The only way to suddenly change the gravity on Earth would be to change the mass of the planet. A change in mass great enough to result in a change in gravity isn't going to happen anytime soon.
Explanation:
Gravity keeps us to the ground and accelerates us to the ground. Without gravity this would no longer happen and you could fly off into space. ... Planets, orbits, star and things like that are help together by gravity. Without gravity the moon would fly off and away from earth.
The sensation of weightlessness, or zero gravity, happens when the effects of gravity are not felt. Technically speaking, gravity does exist everywhere in the universe because it is defined as the force that attracts two bodies to each other. But astronauts in space usually do not feel its effects.