The speed of earth's rotation about its axis is ω Its speed is increases to x times to make the effective acceleration due to gravity equal to zero at the equator. Then x is
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a
1
b
8.5
c
17
d
34
answer is C.
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Detailed Solution
ω=2π24×3600g′=g−Reω2 or 0=g−Reω2or ,ω′=gReω′=2π84⋅6×60∴ ω′ω=24×360084⋅6×60=17