Question

Let g be the acceleration due to gravity at earth's surface and k be the rotational K.E of earth suppose the earth's radius decreases by 2% keeping alt other quantities same then

1. g decreases by 2% and K decreases by 4%
2. g decreases by 4% and k increases by 2%
3. g increases by 4% and K increases by 4%
4. g decreases by 4% and K increases by 4%