Calculate the escape velocity on surface of earth of radius of moon is 1740km and Massis7.4 *10to the power 22

Answer 1

F = - G m M/r^2
work done from R to infinity
F dr = G m M/R
so
G M m/R^2 = Ke at surface = (1/2)m v^2

v^2 = 2 G M/R

G = 6.67 * 10^-11
M = 7.4 * 10^22 kg
R = 1.74^10^6 meters

plug and chug