Here, a trajectory is placed stationary in the path of a planet's orbit. Now this trajectory has no mechanical energy to speak of. Now as the planet approaches the object the object comes under the influence of the planets gravitational field and moves towards it. Now what happens is, the object fall onto the planet and then I, standing on the planet's crust put a turbine down at exactly the point where the object's gonna fall, such that the object hits the turbine's blades and converts its K.E. to electrical energy which I store in a battery. Now my question is, where did this energy come from for the trajectory had none to speak of. Now you might say that the planet's in motion so it's the K.E. of the planet so consider Case II.
Two objects A and B are placed together in a vacuum such that their Gravitational Fields touch each other at a single point. In the beginning they had no mechanical energy to speak of, but as they enter each other's gravitational field they move and gain mechanical energy. Now after doing this I ask you the reader, have I created Energy out of nothing?
P.S. I am still in high school(1st year), so if this questions do seem childish do excuse me for my actions. Also try to explain your answers in a way I could easily understand them.
P.P.S. Is there an easier way to make diagrams besides Paint? I have been wasting a lot of time making diagrams.