Question

The moon's radius is 1/4 th that of the earth & its mass is $\frac { 1 } { 80 }$ times that of earth, if g represents the acceleration due to gravity on the surface of earth, that on the surface of moon is–

• A.
• B.
• C.
• D. $\infty$

Answer 1

Answer: (B)

Answer 2

We know gravitational acceleration

g =

for moon R_m = & M_m =

so g¢ = $\frac { 1 } { 5 } \left\{ \frac { \mathrm { GM } } { \mathrm { R } ^ { 2 } } \right\}$ = g/5