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
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
- A
$g$ decreases by $2\%$ and $K$ decreases by $4\%$
- B
$g$ decreases by $4\%$ and $K$ increases by $2\%$
- C
$g$ increases by $4\%$ and $K$ increases by $4\%$
- D
$g$ decreases by $4\%$ and $K$ increases by $4\%$
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