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JEE Mains · Physics · STD 11 - Gravitation
  • JEE Mains 2018
  • Medium
  • MCQ

Suppose that the angular velocity of rotation of earth is increased. Then, as a consequence.

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Correct Answer

(D) Except at poles, weight of the object on the earth will decrease

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With rotation of earth or latitude, acceleration due to gravity vary as \(g' = g - {\omega ^2}R\,\,{\cos ^2}\,\phi \) Where \(\phi \) is latitude, there will be no change in gravity at poles as \(\phi  = 90^o\) At all other points as \(\omega \) increases \(g'\)  will decreases hence, weight, \(W = mg\)  decreases.
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