Disclaimer : I am quite a beginner in physics, so very sorry if this is too much basic of a question but I have never read anything about what I am going to ask now. Or maybe I have but did not understand ?
In Newtonian physics It takes energy (work) to move a given mass at rest From one location in space to another. I assume it is the same in general relativity. Then, as time is the fourth dimension of space-time, where does the energy to move in time comes from ? I hope my question is not too much ill-posed. Don't hesitate to edit if you feel it can help. Thanks.