How can I simulate the rotation of a motor?

[AviKarthik]

I am trying to simulate the rotation of a motor with a rod attached to it with a box at the end (pictures are attached), I want to simulate how the forces of gravity and other forces from different bodies acting on a ball inside the box change as the position of the box changes with the motor's rotation. My first thought was to make a planet which would "orbit the satelite" but make the orbit small enough that it would simulate the box orbiting inside of the satelite, but im not sure if there is a way to do that or how. Any other ideas? (ignore the random screws in the images)

Pictures: https://imgur.com/a/bqc6WUP