Planet A has twice the mass of Planet B.From this information,what can we conclude about the acceleration due to gravity at the surface of Planet A compared to that at the surface of Planet B?
A)The acceleration due to gravity on Planet A must be twice as great as the acceleration due to gravity on Planet B.
B)The acceleration due to gravity on Planet A must be four times as great as the acceleration due to gravity on Planet B.
C)The acceleration due to gravity on Planet A is the same as the acceleration due to gravity on Planet B.
D)The acceleration due to gravity on Planet A is greater than the acceleration due to gravity on Planet B,but we cannot say how much greater.
E)We cannot conclude anything about the acceleration due to gravity on Planet A without knowing the radii of the two planets.

Question

Quizplus · Accepted Answer

The acceleration due to gravity is determined not only by the mass of a planet but also by its radius. Without knowing the radii of the two planets, we cannot accurately compare the accelerations due to gravity on their surfaces.

Planet a Has Twice the Mass of Planet B