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Why the value of \'g\' on earth is maximum at the poles and minimum at the equator |
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Answer» 9.8MS2 Acceleration due to gravity on the surface of earth g = GM/r2, where r is the radius of the earth, M the mass of the earth and G the universal gravitational constant.In the above expression for g, G and M are constant. But r varies due to the shape of the earth. We know that the shape of the earth is not a perfect sphere. It is flattened at the poles and bulged at the equator. So the polar radius is smaller than the equitorial radius. Hence g is slightly more at the poles than at the equator.\xa0Thus the value of g on earth is maximum at poles and decreases as we go from poles to the equator and is minimum at the equator. also g decreses as we increase or decrease the distance of a body from the centre of the earth.\xa0Also the value of g decreases as we go above the sea level and again decreses deep iside the earth. At poles the value of g is greater i.e 10 than its value at equater i.e 9.8 . |
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