Q.9 If the mass of an planet is two times of mass of earth, and radius of the planet is ½ times of radius Of earth .then find out the value of gravitation acceleration of the planet
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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).
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