Question

the escape velocity on the surface of earth is 11.2 what would be the escape velocity on the other surface of another planet of the same mass but 1/4
times the radius of earth is

Answer 1

V = root 2*gr = root 2*GM/R
V' = root 2*4 *GM/ R = 2*v = 2*11.2=22.4 m/s