Question

all about escape velocity​

Answer 1

hiiii..

escape velocity:- the minimum speed required to project a body vertile upward from the surface of the earth so that it never return to the surface to earth is called escape velocity.

at the speed of body projected overcome the gravitational pull of Earth

expression:- consider a body mass m from the centre of the earth

now the gravitational force between the body and the earth is given by

F=GMm/r2

their expression see in attachment