Answer to Question #267473 in Physics for Tata

Question

If the earth were the same size but twice as massive, what would be the value of G? What would be the value of g? (Let your equation g = Gm/d2 guide your thinking.)

Answer 1

The value of G would be the same as it is a constant of our universe, the value of g would increase twice:

$$g=\frac{G(2M)}{d^2}=19.6\text{ m/s}^2.$$