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JEE PHYSICS MCQ: GRAVITATION

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Application +4 | -1

The angular speed with which earth should spin about its axis, such that a person feels

\left(\frac{5}{9}\right)^{\text {th}}

times his weight at equator as compared to his weight at pole

View answer and explanation

Correct option: C

\frac{2}{3} \sqrt{g / R}

Option D (

\frac{1}{3} \sqrt{g / R}

) is incorrect. The correct answer is C (

\frac{2}{3} \sqrt{g / R}

) because it is derived from setting the effective weight at the equator to 5/9 of the weight at the pole and solving for the angular speed.

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