Is gravitational power of earth greater than or less than 9.8m/s in polar regions?

Answer 1

It is a bit more. Gravity varies by altitude, latitude and local variation. From Wikipedia:
"On the earth's surface, the gravity will depend on the location at which it is measured, and is smaller at lower latitudes, for two reasons.

The first is that in a rotating non-inertial or accelerated reference frame, as is the case on the surface of the earth, there appears a 'fictitious' centrifugal force acting in a direction perpendicular to the axis of rotation. The gravitational force on a body is partially offset by this centrifugal force, reducing its weight. This effect is smallest at the poles, where the gravitational force and the centrifugal force are orthogonal, and largest at the equator. This effect on its own would result in a range of values of g from 9.789 m·s−2 at the equator to 9.832 m·s−2 at the poles [1] .

The second reason is that the Earth's equatorial bulge (itself also caused by centrifugal force), causing objects at the equator to be farther from the planet's centre than objects at the poles. Because the force due to gravitational attraction between two bodies (the Earth and the object being weighed) varies inversely with the square of the distance between them, objects at the equator experience a weaker gravitational pull than objects at the poles.

The combined result of these two effects is that g is 0.052 m·s−2 more, hence the force due to gravity of an object is 0.5 % more, at the poles than at the equator.

If the terrain is at sea level, we can estimate g:


where

gφ = acceleration in m·s−2 at latitude φ"

Answer 2

It should be slightly greater as the poles are closer to the centre and this results in a higher gravitational pull according to newton's formula.


Force(Gravitational)=GX(mass no1Xmass no2) over distance between bodies

Answer 3

For the same reason either hemisphere is cold during winter--at the poles, sunlight never hits straight on, but at a steep angle. Without direct sunlight, you don't get much heat. Compounding this is the albedo effect: ice and snow reflect some of the sunlight you do get at the poles, making it even colder. That's changing though, as the global climate warms.

Answer 4

It is greater because the poles r nearer to the centre of the earth than the equator
.
earth is a sphere

Answer 5

The acceleration due to gravity is more in the polar regions. It is 10 compared to 9.8 in other regions

Answer 6

Gravity varies by location on Earth. However, it does not simply follow topology as other answers suggest, and the precise reasons for its variation are not known. They are assumed to be due to differences in sub structure of rocks.

See the measured (rather than theoretical) gravity ,ap in the link.

Answer 7

g=9.8 m/s^2 is just average,this value is not constant every where and experiments prove that this value is most viable near the earht surface, so dont be confuse ,as we go beyond the earth gravity region this decrease

Answer 8

I think it's slightly weaker, but not nearly enough to feel a difference

Answer 9

greater than

Answer 10

it is greater in poles as latitude angle is more in poles..