Question

the mass of a planet is 2 times that of earth and radius of planet is 3 times that of earth. what is the acceleration due to gravity on the surface of that planet take gE=9.9ms-²​

Answer 1

Answer:

It should be g=GM/r^2, where r^2 means the radius squared. After correcting the formula you can calculate that the gravitational acceleration on the surface of a planet with a mass twice that of earth's mass and with radius twice earth's radius will be half that on earth, namely 4.9 m/s^2 (9.8/2 m/s^2).