The Earth bulges out at equator due to the shape of the earth. The earth is not a true sphere but it is an ellipsoid. The equatorial diameter of the earth is 12756.27 kms. While its polar diameter is 12713.505 km. the difference between its equatorial and polar diameter is about 43 kilometres. The rotation of the earth on its axis produces a centrifugal force which increases its equatorial diameter. That is why earth bulges at the equator. Discover magazine Subscription in Pakistan
Ellipsoid:
Ellipsoid, closed surface of which all plane cross sections are either ellipses or circles. An ellipsoid is symmetrical about three mutually perpendicular axes that intersect at the center.
Examples of ellipsoid from daily life are:
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- Water Melon
- Rugby Ball
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Water Melon
Rugby Ball
