Carla and Jenny are arguing about whether or not it is possibleto escape the gravitational field of the Earth. Carla shows Jenny asystem where mass m is rE (not theEarth's radius) distant from Earth and rP (notplanet P's radius) distant from planet P, the mass being on theline connecting the Earth and planet P. Carla states that the massm has escaped if FP on m =−FE on m. Jenny disagrees. Which one, ifeither, is correct, and why?
