Energy to reach the speed of light?

How much energy would it take to accelerate a 1000 KG mass to 50% of the speed of light? Please also specify a possible fuel and possible engine that might be used and how much fuel would be needed. Bonus for calculating how much time it would take to reach that speed.

A more difficult question would be to include the mass of the fuel with the original mass. Then you would need fuel to accelerate the mass of the fuel as well.

Please, no "hyperdrives" or "warp engines" or "antimatter". Please only solve with today's existing fuels and engines.
johnnythomasly
Asked Jan 25, 2011
Great answer Jeremiah.

In addition to all of the above, there is the very difficult question of what happens to matter as it approaches the speed of light. That might be possible at half lightspeed but another problem would enter the picture beyond that.

Since the speed at which valence electrons or electron waves transfer energy is roughly the same as the speed of light, even if you could produce enough energy for speed of light acceleration, the material being transported could not remain in the same form. What forces might overcome the glue that holds the fuel and the object together are beyond our wildest imagination.

The "beam me up Scotty" concept where the object is decomposed into a pattern, transported in a beam of light and reassembled on the other end, as far fetched as it seems, would be more realistic than moving the actual object at those speeds, especially at distances measured in light years. Even if that was possible it would take years to reach the closest stars.

Rob
Answered Feb 06, 2011
Thats pretty hard because you need exponential energy everytime you double speed, and it would take an infinite amount of energy to get an object with mass at the speed of light. But if you want a 1000 kg mass half of that speed it would need a lot of energy, probably not in our reach with todays engines and fuels. I`m not that smart since I`m just a 6th grader but right now the fastest thing thats moving made by man is a satellite heading for pluto and its at around 45,000 mph and thats 14,000 times slower than light so I dont think we`ll be seeing a 1000 kg thing flying at 335,308,314 any time soon. And again I`m just in 6th grade so dont get angry if I didn`t give you any specific specifications.
Jeremiah
Answered Feb 06, 2011
Actually you're right. We can come extremely close to it but with out current technology it is impossible for us to reach the speed of light.

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