What happens to the potential energy?

Question

If i toss an apple into the air, as it goes up, the kinetic energy goes down while the potential energy goes up.

The visible Universe ends where objects are moving away from us faster than the speed of light - due to the expansion of space. If the apple goes past the visible edge of the Universe, even if i fire a beam of light at it, the beam of light will never catch up. Never.

Now, gravity propagates at the speed of light. So the apple's gravity past the visible edge of the Universe can have no effect on us any more. Does the apple continue to have potential energy or not? If not, where did the potential energy go?

Answer 1

I understand that potential energy becomes kinetic energy when it is released.  Kinetic energy is nothing more than energy in motion. I've not read anything about the expansion of the universe being faster than the speed of light so I cannot begin to make a judgment on the second part of your question. My first impression is that the object would continue to have kinetic energy since in your scenario it is moving faster than gravity.

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