why is the world round and we do not fall off?

Question

it is said that this can be acredited to gravity but how does gravity works

Answer 1

Gravity is very strange. We can test it, measure it, even manipulate it, we have known about it for hundreds of years, we know how it works- yet no-one knows what causes it.

Answer 2

As some other people have stated, gravity is the force which stops you from floating off the Earth. The Earth is a body with a large mass relative to a person. Every body that has mass exhibits some kind of gravitational pull to other bodies with mass. The greater the mass, the greater the gravitational pull. The reason the solar system exists is that the gravitational pull of the sun keeps the planets in orbit (otherwise they would just continue in a straight line and float off into outer space).

The gravitational pull of the Earth also keeps the moon in orbit for the same reason. The Moon is a fairly large body, but is small (in mass) in comparison to the Earth. It has about a tenth of the gravitational pull of the Earth and you would notice this if you tried to walk on the moon (ie large moon steps - good for your golf driving, though ;-p)

The atmosphere does not help to keep you 'stuck down' but it does provide friction when bodies are moving through it, so it would slow you down and cause heat (hence burn up on re-entry).

Great question, like someone else said, it is good to ask like a child and question the very foundation of what we believe to be the truth of how things work. This is the basis of scientific research otherwise we would all still be living in caves on a flat earth with a sun that literally rises and falls over the top of us.

Answer 3

Einstein's theories about gravity are a bit complicated to explain in full, but basically all matter has something called 'mass' and there is a relationship between all things with mass and we call that gravity. In short big things (like planets) attract little things (like people). It's got nothing to do with the eath's rotation. Even if the earth was not spinning it would still have a gravitational pull on us. If the earth suddenly stopped spinning we would fly off the ground just in the same way that you fly into a car windscreen if the car suddenly comes to a halt. However I think if the earth suddenly stopped rotating we would eventually fall back to earth, but not necessarily where you left it!

Answer 4

I assume this is a genuine question. Anything has gravity, this is something that pulls other things towards it like a magnet. The bigger it is the more it pulls things to it. When you jump up gravity pulls you back down. Gravity makes every thing fall back towards the middle of the earth so where ever you are in the world down is always towards the middle of the wolrd.

Answer 5

The Earth is spinning very, very fast, it creates a centrifuge effect (try spiining a bucket of water above your head very fast, you won't get wet unless you are careless when slowing it down.

Plus the iron core at the centre of the Earth is also spinning which creates a massive magnetic field.

The Earth is large, much, much larger than we are and everyone knows that a larger body attracts smaller ones to it, this is what we call gravity but I'm pretty sure the other two phenomena have something to do with gluing our feet to the ground.

Answer 6

yes r u serious??!!
how old r u??
gravity is in the center of Earth and it keeps pulling everything to it.\ planets orbit the sun because of gravity, and the moon orbits the earth. All matter has gravity even u, but ure not that heavy to pull things because earth gravity is much stronger...
Take a look at newtons law of gravity and the 3 rules of motion!! google it!!

Answer 7

The answer lies in how gravity works. Gravity does NOT pull in one particular direction everywhere. Instead, it pulls towards all objects in the Universe with mass. The force of gravity between any two objects with mass (objects without mass are unaffected by gravity) is proportional to the mass of each object and inversely proportional to the square of the distance between them.

So, if you have m1 and m2, both objects with mass, and they are one meter apart and there is a force of one newton (a newton is a measure of force approximately equal to 100 grams of weight) between them, then if you increase the mass of m1 by two times there will be two newtons of force, and then if you increase the mass of m2 by two times as well there will be FOUR newtons (2X2=4) and if you move them so they are two meters apart, there will only be ONE newton again (4/(2^2)=4/4=1). As such, the Earth, being by far the largest nearby object, pulls everyone on its surface towards it. So the gravity felt by people on the opposite side of the Earth is technically in the opposite direction to the gravity you feel, because both forces are directed towards the center of the Earth, which is between you.

Get the idea?

Answer 8

Do not listen to any scoundrel that makes snide remarks they always have and always will remain the enemies of science. Even Albert Einstien tried to ask and answer like a child and his level of thinking created quantum physics, so if they call you a child you have the right to behave like one in the science world and spit in their faces, and answer in all modesty your own questions.
Someday I will be in space and so will you because you are not afraid to ask questions. I can recommend some good books in tenure with how brave you want to go. For this question just read up on your newton and old arabic maths.

Answer 9

Ever heard of gravity?

Answer 10

Gravity causes us to have mass - weight, in simple terms - which means we are heavier than air so don't float off.