Question

What do you mean by escape velocity derive an expression for it?

Answer 1

Answer:

Expression for escape velocity: Let a body of mass m be escaped from the gravitational field of the earth. During the course of motion, let at any instant, body be at a distance r from the centre of the earth

Answer 2

${\huge{ \fcolorbox{red}{pink}{Answer}}}$

DEFINITION: the minimum speed with which a body must be projected in order that it will escape from the Earth gravitational field is called as escape velocity. DERIVATION: consider a body of mass m on the surface of the earth whose mass and radius are respectively represented by M and R.