Q. The moon’s radius is 1/4 that of the earth and its mass is 1/80 times that of the earth. If $g$ represents the acceleration due to gravity on the surface of the earth, that on the surface of the moon is
A) $g/4$
B) $g/5$
C) $g/6$
D) $g/8$
Explanation
(b) Using $g = \frac{GM}{R^{2}}$ we get $g_{m} = g/5$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.