Why is Gravitational force only on Earth?

Answer 1

Gravity is everwhere but less or more, depends on the matter.

Answer 2

Well, it is not exactly only earth.

Gravitation is a property by which all objects attract each other. Modern physics describes gravitation using the general theory of relativity, but the much simpler Newton's law of universal gravitation provides an excellent approximation in many cases.

Gravitation is the reason for the very existence of the earth, the sun, and other celestial bodies; without it, matter would not have coalesced into these bodies and life as we know it would not exist. Gravitation is also responsible for keeping the earth and the other planets in their orbits around the sun, the moon in its orbit around the earth, for the formation of tides, and for various other natural phenomena that we observe.

Every planetary body, including the Earth, is surrounded by its own gravitational field, which exerts an attractive force on any object. This field is proportional to the body's mass and varies inversely with the square of distance from the body. The gravitational field is numerically equal to the acceleration of objects under its influence, and its value at the Earth's surface, denoted g, is approximately 9.80665 m/s².



In conclusion, almost every planet has its own gravitational force.

Answer 3

It isn't. All mass has gravity. Scientists call this a gravitational field. The farther away you get from say, a planet, the weaker the field, and thus the force of gravity, becomes.

Here on Earth's surface, and close to it, the "strength" of gravity is 9.80 m/s^2 This number is an acceleration because if you jumped out of an airplane it's the rate you'd accelerate at due to the Earth's gravity.

If you were to go 300 miles up (well into outer space), that number is about 8.47 m/s^2

So if you weighed about 175lbs on Earth, you'd weigh about 151lbs 300 miles up.

Things stay in orbit by going so fast that they move around the Earth at the same rate they fall towards it at. This gives an illusion of being weightless. For this reason, NASA never says that astronauts are in zero gravity. They simply call it microgravity. The astronauts are in a continual state of free fall.

Answer 4

Gravitational "force" doesn't only exist on earth. The moon has it's own gravitational pull that is approximately 1/6 of the earth's. The sun's gravity is what keeps the planets in orbit. In fact, everthing that has mass has a gravitational pull proportional to it's mass.

Answer 5

It isn't. It is everywhere in space too. The gravity of the Earth keeps the space station orbiting Earth at 17,500 miles per hour instead of speeding off into space on a straight line at 17,500 miles per hour for example. The astronauts are only weightless because they are always falling. The space station moves forward almost 5 miles every second, but because the surface of the Earth is curved, it is a few feet farther to the ground from a place 5 miles in front of the station than it is right below the station, and a falling object falls just enough in a second to end up at the same height above that slightly lower ground after one second. In effect the space station is falling around the Earth.

In a similar way the Sun's gravity keeps the Earth orbiting the Sun instead of flying off in a straight line at 66,000 miles per hour.

Answer 6

Anything with enough mass in the universe will create a gravitational field, including stars as well as planets and large asteroids. The larger the mass the stronger the gravitational pull.

Answer 7

It is not only on Earth, it is everywhere; even inside the atom.
Any mass has gravitational force, the moons gravitational force causes our tides, and if you get near any mass such as Earth you will be drawn towards it. OK

Adjust your thinking and you'll understand better.

Thanks for the the question though.

Yours truly;
Jonnie

Answer 8

It isn't. It's found on all masses. Many astronomical bodies have much stronger gravitational fields than Earth does.

Answer 9

Gravity is between every particle, most the force is too weak to feel. we only feel the Earths because it has so much mass, and were at a relitively short radius from the center.

Answer 10

Its all over the universe like said before. How did you think it is only on earth? How do you think the earth is revolving around the earth or any other planet??? I think you should go through the basic physics before you come up with questions like these.... Do us all a favour and read before you ask!!

thanx.