Question

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

Answer 1

$V_m=\sqrt{\frac{2GM}{R_m}}$
= $\frac{2\times 6.67\times {10}^{-11}\times 7.4\times {10}^{22}}{1740}$
$=5.673\times {10}^{31}$