I know it's not possible to travel back in time. But, could you theoretically travel to the future? I read some where that time would slow down for someone traveling close to the speed of light. If this theory is correct. Could you construct some sort of perpetual motion machine, to achieve these speeds? I'm thinking, maybe magnetic and in space, to reduce friction and air resistance.Theories on time travel and perpetual motion?Yes there can be a machine that can travel time but its not exactly one that travels extremely fast. I am not saying there is one but math says its possible. Albert Einstein said time travel is possible if you bend spacetime with an extreme amount of energy that you basically get a worm hole. But remember this will take ALOT of energy. You can't even imagine. More than 1,000 quasars.Theories on time travel and perpetual motion?it's all mathematical games with numbers it has no meaning in the real world and can't be proved either wayTheories on time travel and perpetual motion?We are all traveling to the future at a steady pace, but I guess you want to travel to the far future without aging yourself. Einstein's special theory of relativity says this is very well possible if you would, as you read, travel close to the speed of light since this slows down time for the traveler. The easiest way to imagine how you would do this is to board your space ship and launch yourself into space where there is very little friction, so when you have accelerated up to near light speed you can keep coasting for a few weeks while the centuries pass back on earth. You could stop and race back or make a wide arch and return to earth and find yourself in the far future.
The hardest part will be to keep accelerating up to the ultra high speed since this will require an enormous amount of energy. (A perpetual motion machine is not necessary, just a lot of energy you could get from nuclear fusion or anti-matter conversion (both are not practically available at the moment but theoretically feasible))
Mind you, you won't be able to go back in time even if the future turns out to be less interesting than you hoped it would be.Theories on time travel and perpetual motion?
It is most certainly possible to travel into the future. It is a well understood and well tested consequence of the theory of Relativity. In principle, human beings have actual done this. Here's how it works: if you accelerate (at all) or experience gravitation, your clock will be observed as moving quickly by an observer who is not accelerating (or experiencing gravitation) or who is doing so to a lesser extent than you are.
To travel to the future, all you need to due is capitalize on this effect to whatever extent you want. Simply walking in circles (and thus accelerating) will cause you to slowly move into the Earth's future (but to an unmeasurable degree). If you want to actually notice this effect, you would need capabilities that human technology cannot yet provide; sorry.
Maintaining a fast speed by itself will not allow you to experience this effect. If two observers (e.g. you and the whole Earth) move with some velocity relative to each other, each sees the other as moving more slowly with time. As far as you'd be concerned, if anything, the Earth would be moving into your future! It is the act of turning around and returning home (which involves acceleration) which pushed you "into the Earth's future", so to speak.
A perpetual motion machine is one that maintains a constant state of motion, not one that gains momentum. A perpetual motion machine is bad enough (just barely impossible) but the sort of device that you are suggesting flies right in the face of some very fundamental laws of physics. Since you are accepting the consequences of physics that you like (the surprising possibility of time travel to the future) it is only fair that you accept the rest.
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