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. `4.9m//sec^2`
B. `3.1m//sec^2`
C. `9.8m//sec^2`
D. `19.6m//sec^2`

Answer

C

Explanation

`g=(GM)/(R^2),because` M and R not change `thereforeg=9.8m//s^2`