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The reason is because Earth has a slightly oblate shape.
1. Earth isn't an exact sphere and it's slightly oblate, so there is less distance to the center of gravity at the poles than at the equator. 2. Earth rotates, so you have t…o factor the centrifugal force of rotation that works against gravity, which is highest at the equator and zero at the poles. The difference is gravity, however, is extremely small, on the order of 0.4% to 0.5% -- so an object that weighed 1000 grams at the poles would weigh between 995 and 996 grams at the Equator, and also a tiny bit less if it was at an elevation high above sea level.
Simple, although the mass is less at the poles, because the earth is spinning and therefore the earth's circumference swells at the equator, creating more mass underneath your… feet; the centrifugal force created by the spinning actually amounts to pushing you away from earth more than the increase in mass-pull due to that swelling. Remember how hard it was to hold onto the merry-go-round when they spun it really fast?...its like that. Ask any equatorial fish..they'll tell you. :-)
At the poles: (1) You are closer to the center of the Earth. (2) There is not the centrifugal force (or centripetal acceleration, if you prefer) which acts at the equator.
Actually it is slightly weaker due to Earth's rotation
The planet Earth is not a perfect sphere. Instead, it is slightly flatter than an average sphere at the North and South poles. Gravity is stronger when you are closer to the c…entre of the Earth, so if the poles are flatter than the rest of the Earth's surface, they would be closer to the centre of the Earth, therefore making gravity stronger at those points.
The strength of gravity is different at the poles and the equator because the earth is not actually spherical.
no, but the electromagnetic field of the earth does.
Is the altitude of the tropopause greater at the equator than at the poles or at the poles than at the equator?
It is greater at the Equator. The boundary between the troposphere and the stratosphere varying in altitude from approximately 8 kilometers (5 miles) at the poles to approx…imately 18 kilometers (11 miles) at the equator.
gravity is more in the poles because poles are the extremes and equator is in middle which divides the earth into two
Values of g at equator is lesss as compared to that of poles
The North pole due to centrifugal force and its effects at the equator
At poles, gravity is maximum as distance from center is largest.
THEORETICALLY the answer to your question is yes. Locations at the poles are both closer to the center of the earth and are not accelerated tangentially by the rotation of the… planet. The latitudinal variation results from the fact that the Earth is not round like a ball but is more pancake shaped (it is fatter round the equator - the equatorial bulge at the equator is measured at 26.5 miles (42.72 km), the shape of an 'oblate spheroid'. This shape is caused by the fact that the Earth is spinning which means 'stuff' at the equator is moving round faster than 'stuff' at the poles and this flings it away form the centre of the Earth. The faster spin at the equator produces an outward centrifugal force which counteracts the Earth's gravity to a small degree, reducing downward acceleration of falling objects. Thus at the equator, this apparent gravity is 0.3% less than actual gravity. However, things are more complex - if the Earth were an inert sphere of uniform density, you could work out (model) what the gravity aught to be at any point on its surface (this is called the geode). However, if you go out and measure gravity at various points on the Earth, the values you get are different from this theoretical model because the actual strength of Earth's gravity varies with latitude, altitude, local topography and the underlying geology (the density of the rocks below you). These factors can cause a actual gravity reading to far exceed modeled predictions relating to the variation between the equator and the poles.
The diameter is greater at the Equator, because the Earth is not a perfect sphere but is flatter toward the Poles.