how much quicker than present must the earth revolve on its axis to make bodies at the equator experience weightlessness?and what will be the duration of the day ?

Asked by sunakshi | 5th Nov, 2013, 04:00: PM

Expert Answer:

The speed is given as
v = rω = 2πr/T
 
Thus, current speed of earth is
 
 
In order to feel weightless, the gravitational force should be equal to the centripetal force.
Therefore, the new speed is
 
 
Thus, the earth has to move 17 times faster than present speed.
 
For this new speed, the duration of the day will be
 

Answered by Romal Bhansali | 10th Nov, 2013, 01:15: PM

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