Why is gravity not as strong in certain areas of the planet than others?

Question

There seems to be an area of India where gravity is less strong than anywhere else. Should it be constant all over?

Answer 1

There's 3 reasons why gravity isn't even everywhere on Earth:

1) Earth isn't perfectly spherical, it's slightly crooked. That includes local elevation changes, like mountains, as well as the fact the earth is closer to being a oblate spheriod instead of a true sphere.
2) Density of matter underground isn't constant. For example, the thickness of the lithosphere (the topmost crust that we stand on) varies in thickness, and it's of a less dense material than the upper mantle.
3) Earth spins, but this is not properly part of the MEASURE of gravitational pull, which is why this factor is taken out after measurements. It clutters our "understanding" of what's under the ground.

Answer 2

Gravity is a force that is governed by distance and mass. The more "stuff" underneath you and the closer it is to you, the greater the gravitational pull. F=GMm/r^2, where F is Gravitation force, G is the Gravitation constant, M is the mass of the earth, m is the mass of the object, and r^2 is the distance between the two squared. If the earth was a perfect sphere of uniform density gravity would be the same strength everywhere on the surface. However it isn't, so this only works as an approximation. There are variations in density, land vs water, and variations in distance, like mountains. Another effect on gravity is centripetal acceleration; basically because the earth rotates it bulges around the equator, this also causes changes. So you can see there is a large number of things that can cause regional variations in gravity. However, none of these are significant to most people, you can't go to a different part of the earth and suddenly find that you can jump a foot higher or anything like that.

Answer 3

No, gravity is not constant everywhere. Its a matter of geophysics. Geologic structure, formation type and mass, proximity to massive objects like mountains, both local and global all play a part. Gravitational anomalies occur all over the earth. It is a very complex science, far too complex for here.

Certain geological surveys and university libraries often have gravitational maps available for viewing. These maps are very important for certain geological studies and exploration.

The short answer is yes, but the differences in gravitational pull over an area are so slight, the human cannot feel them.

Answer 4

wow. The moons gravity is a million/6 of earths because of the fact its mass is a million/6th. in accordance to your concept, gravity is proportional to the quantity of an merchandise. in reality it is proportional to the mass of the object, and this has been shown. The earth did no longer exist on the time of the large bang. neither did the different actual merchandise. So why have they have been given gravity now?

Answer 5

The equation to calculate gravity on any object is:

g=(Gm1m2)/r^2

where
g=acceleration due to gravity (about 9.8 9.8 m/s^2 on earth)
G=gravitational constant (6.67x10^-11 everywhere)
m1=mass of body (earth=5.98x10^24 kg)
m2=mass of second body (does not apply here)
r=radius (6.38x10^6 m on earth)

when the elevation changes, the r value changes. because it is in the bottom, g goes up when r goes down and vice versa. )g is is inversely proportionate to the square of r). So if you change your elevation on the earth, g will change ever so slightly (but you will never notice them without extremely advanced and expensive tools)

Answer 6

Gravity varies in intensity as a result in both the density of the earth at a particular location as well as its distance from the earths core, for example of you were standing at the bottom of a granite valley, you would feel more gravitational force than if you were standing on a sandstone mountain.

Answer 7

It should be as strong anywhere else depending on elevation. It changes slightly as you get farther away from Earth, or if you go closer to the core.

Answer 8

There are other forces acting as well, charges for example that could interfere.

Also varriations of the density of earth and the exact center of mass, but it shouldn't be noticably different.

Answer 9

it depends on the pull, also the shpae of the planet