First of all, I have read other questions, and seen how an object gains mass just by gaining a lot of speed. But here, I am talking about losing some of that mass to convert the value into kinetic energy.
Let's use the starship Enterprise, firstly, because it is physically massive and well known, also because because I was just watching a documentary about physics on netflix, and it made me want to watch Star Trek. The person on the documentary said that mass and energy are equal (which is well known), but he also said that if someone were to be turned into pure energy, they would produce a massive amount (I never knew just how tremendous this value was), but that it was probably impossible to do.
I tried to look up special relativity with acceleration, but I could not understand it very well, and was unable to come to a conclusion [some places even said it was foolish to use acceleration in special relativity, and I did not know what to think].
The ship is supposed to combine matter and antimatter in order to have a net energy gain of 100% (which I am not asking anyone to validate), and can achieve relativistic speeds (obviously, because it travels between star systems with ease). If we say that the ship itself weighs something like one million kg [just something huge], how much energy would it have to use to accelerate to a any given relativistic speed? Also, would the ship itself be converted into kinetic energy just by traveling this fast, since it is so large?
If a larger value for acceleration proves to be impractical for humans, please address it nonetheless. Does it make a difference how fast you accelerate when considering this problem?