Question
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
Options :
g decreases by 2% and K decreases by 4%
g decreases by 4% and K increases by 2%
g increases by 4% and K decreases by 4%
g decreases by 4% and K increase by 4%
Answer :
g increases by 4% and K decreases by 4%
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