The value of ‘ g ’ at a particular point is `9.8 m//s^(2)` . Suppose the earth suddenly shrinks uniformly to half its present size without losing any mass. The value of ‘ g ’ at the same point (assuming that the distance of the point from the centre of earth does not shrink) will now be

Options

A. `9.8ms^(-2)`
B. `4.9ms^(-2)`
C. `19.6ms^(-2)`
D. `39.2ms^(-2)`

Answer

A

Explanation

`g=(GM)/(R^(2))` both M and R are constants