You mean Quantum physics, mechanics would screw the lot up and charge you for the inconvenience. And when you got back home you'd never be able to start the flux capacitor again.
Honestly, you guys... Have you not noticed the problem here? It's the human condition that says our 'time' is accurate in some way! It changes all over the shop so time-travel happens every day! No, it is not possible to go to say the 1940's or zoom to 2150's. If it was possible, we would have already ****ed it up and destroyed the time/Space continuum... My fave quote is as follows... "The views of space and time which I wish to lay before you have sprung from the soil of experimental physics, and therein lies their strength. They are radical. henceforth, space by itself, and time by itself, are doomed to fade away into mere shadows, and only a kind of union of the two will preserve an independent reality."