If a planet has a mass twice that of Earth and a radius four times that of Earth, the ratio of the acceleration due to gravity on the planet to that on Earth is

Question

Quizplus · Accepted Answer

The acceleration due to gravity is proportional to the mass of the planet and inversely proportional to the square of its radius. If the mass is twice and the radius is four times that of Earth, the gravity ratio is (2)/(4^2) = 1/8.

If a Planet Has a Mass Twice That of Earth