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Q.

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−ω2Rcos2λ

Rotation 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.

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If the earth rotates faster than its present speed, the weight of an object will