Question

A spaceship is returning to Earth with its engine
turned off. Counsider only the gravitational field of
Earth and let M be the mass of Earth, m be the
mass of the spaceship, and R be the distance from
the center of Earth. In moving from position 1 to
position 2 the kinetic energy of the spaceship
increases by

Answer 1

Explanation:

kinetic energy is increased = change in potential energy of a system (spaceship + earth)

= G Mm /R