Question

The mass of the earth is 81 times that of the moon and the radius of the earth is 3.5 times that of the moon. The ratio of the acceleration due to gravity at the surface of the moon to that at the surface of the earth is

• A. 0.15
• B. 0.04
• C. 1
• D. 6

Answer 1

Answer: (A)

0.15

Answer 2

$g = \frac { G M } { R ^ { 2 } }$ (Given

Substituting the above values, $\frac { g _ { m } } { g _ { e } } = 0.15$