Concept explainers
To find: Whether the weight of an object is more or less at equator and pole.
Explanation of Solution
Introduction:
At pole the distance from centre of earth is less than that of equator.
The weight of object at pole will be more than that of equator because of two effects.
i) Radius at pole is less than that of radius at equator i.e.
ii) Due to the rotational effect of earth the object will feel on centrifugal force, at equator.
The earth is not a perfect globe. The earth is slightly softened to the poles and extended to
equator. The objects on the poles are close to the center of the earth and meet slightly
gravity than the objects in the equator.
And another reason is that the centripetal velocity is less in the poles than in the equator.
Conclusion:
Therefore, the object at pole will weigh more than that of equator, and these two effects are not opposing each other.
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