Question: The earth is at the origin, the moon is at the point (384, 0), and a spaceship is at (280, 90), where distance is in thousands of kilometers.
(a) What is the displacement vector of the moon relative to the earth? Of the spaceship relative to the earth? Of the spaceship relative to the moon?
(b) How far is the spaceship from the earth? From the moon?
(c) The gravitational force on the spaceship from the earth is 461 new tons and from the moon is 26 new tons. What is the resulting force?