Answer:
(i) If the rotation of the earth stops, no centrifugal force will act on the bodies lying on it. The value of g increases maximum at the equator. As no centrifugal force acts on body at poles, so the value \[g\] is not affected. (ii) If the rotational speed of the earth is doubled, the centrifugal force on the bodies increases. The value of \[g\]decreases maximum at the equator and is not affected at poles. (iii) If the rotational speed of the earth is increased to seventeen times its present value, the value of \[g\] at the equator will become zero. At the poles, the value of \[g\] remains unchanged.
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