in back to the future, ya know when the car has to go 60mph in order to go into a future dimension. ok, that makes sense, but what i don't understand is how the car can still be going 60mph when it reaches the other dimension. theoretically, the car should be at 0mph once it enters the future world, so it would just do a massive burnout instead of truckin along at 60mph. these are the thoughts that keep me up at night.
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i don't really know what the exact speed is, so you could be correct. the point is that the car is moving fast in the present dimension, not the future one. so in order for the car to be going top speed in the future it would have to start at 0mph again after it makes the jump.