Whenever the space shuttle (mass of the shuttle = 2*106 kg) was at outer limit of Earth's atmosphere (distance = 350 km above the Earth's surface), astronauts measured the gravitational force from Earth to be equivalent to 1.7*107 Newton. Supposing that both Earth and shuttle are point masses.
Compute the gravitational force of Earth on the shuttle whenever the shuttle was at the limit of mesosphere, that is, at 90km from Earth's surface. As well, determine the gravitational force the shuttle exerts on the Earth at this point?