1. Escape velocity
2. Expression for escape speed:
Force on a mass m at a distance r from the center of earth
= \(\frac{GMm}{r^2}\)
Work done in taking the body to infinity from surface of earth,
This energy is given in the form of K.E. = \(\frac{1}{2}\)mve2,
where ve is the escape speed.
This escape velocity \(\sqrt{2Rg}\) is estimated to be 11.2 km/son the earth.
3. Escape velocity of planet,