If the earth rotates faster than its present speed, the weight of an object will
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a
Increase at the equator but remain unchanged at the poles
b
Decrease at the equator but remain unchanged at the poles
c
Remain unchanged at the equator but decrease at the poles
d
Remain unchanged at the equator but increase at the poles
answer is B.
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Detailed Solution
g'=g−ω2Rcos2λRotation of the earth results in the decreased weight apparently. This decrease in weight is not felt at the poles as the angle of latitude is 90o.