Let g be the acceleration due to gravity at earth's surface and K be the rotational kinetic energy of the earth. Suppose the earth's radius decreases by 2% keeping all other quantities same, then
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Verified by ExpertsThe correct answer is:
C
and 
If mass of the earth and its angular momentum remains constant then 
and 
i.e. if radius of earth decreases by 2% then g and K both increases by 4%.
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