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If the angular velocity of earth's spin is increased such that the bodies at the equator start floating, the duration of the day would be approximately: (Take g = 10 m s⁻², the radius of earth, R = 6400 × 10³ m, Take π = 3.14)

1. 60 minutes
2. does not change
3. 1200 minutes
4. 84 minutes

Correct answer: does not change

Solution

The duration of the day is determined by the Earth's rotation period, which remains constant regardless of changes in angular velocity affecting weightlessness at the equator. Thus, even if the spin rate increases, the time it takes for the Earth to complete one full rotation remains the same.

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