Final answer:
The net gravitational force of a rocket between the earth and the moon is towards the moon.
Step-by-step explanation:
The net gravitational force of a rocket between the earth and the moon is 4.5N. The direction of this force depends on the reference point chosen. If we consider the rocket to be the reference point, then the force is towards the left (earth) because the force of gravity is pulling the rocket towards the earth. However, if we consider the moon to be the reference point, then the force is towards the right (the moon) because the force of gravity is pulling the rocket towards the moon. So, the correct answer to the question is b) The right (the moon).