Find the acceleration due to gravity of the moon at a point $1000km$ above the moon's surface. The mass of the moon is $7.4\times {10}^{22}kg$ and its radius is $1740km$.

Q. The mass and radius of moon are $7.4\times {10}^{22}kg$ and $17.4\times {10}^{6}kg$ . Find the acceleration due to gravity at the moon .$(G=6.67\times {10}^{-11}N{m}^{2}k{g}^{-2})$

Q. Find the free-fall acceleration of an object on the surface of the moon, if the radius of the moon and its mass are $1740km$ and $7.4\times {10}^{22}$ kg respectively. Take $G=6.67\times {10}^{-11}N{m}^{2}k{g}^{-2}$

Q. Calculate the escape velocity from the moon. The mass of the moon is $7.4\times {10}^{22}kg$ and radius 1740 km.

Q. Mass of moon is $7.34\times {10}^{22}kg$. If the acceleration due to gravity on the moon is $1.4m{s}^{-2}$, the radius of the moon is $[G=6.667\times {10}^{-11}N{m}^{2}k{g}^{-2}]$

Q. At what temperature is the root mean square velocity of hydrogen equal to its escape velocity from the surface of the moon? Radius of moon $=1.74\times {10}^{6}m$ and acceleration due to gravity at moon's surface $=1.67m/s^2$.