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What would be the angular speed of earth...

What would be the angular speed of earth, so that bodies lying on equator may experience weightlessness ?
( g = `10m//s^(2)` and radius of earth = 6400 km)

A

`1.25xx10^(-3) rad//sec`

B

`1.56xx10^(-3) rad//sec`

C

`1.25xx10^(-1) rad//sec`

D

`1.56 rad//sec`

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The correct Answer is:
A
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