If the weight of 5 Kg. body on equator is zero then the angular speed of earth will be -
(Radius of earth 6400 km and g = 10m/s)
(1) 1/400 r/s
(2) 1/800 r/s
(3) 1/1600 r/s
(4) 1/80 rs
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Answer:1800/r/s
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