Question

The mass of a planet is 10¹⁸ kg and its radius is 10³ m. Calculate the acceleration due to gravity on its surface. Use the known value of G. [6.673×10^-11 N m² kg^-2]​

Answer 1

`g = \frac{GM}{r {}^(2) } \\ g = \frac{6.673 * 10 {}^( - 11) * 10 {}^(18) }{(10 {}^(3)) {}^(2) } \\ g = \frac{6.673 * 10 {}^(7) }{10 {}^(6) } \\ g = 6.673 * 10 \\ g = 66.73 \: m.s {}^( - 2)`