i was having a discussion with a friend recently and he seemed to think that you cannot accelerate to a speed which is faster than the speed of the accelerating force coming out of the back of the rocket. but i thought it was the case that u could get to very high speeds in space even if you were being propelled quite slowly and the only limiting factor was the amount of fuel u could carry. i'm sure he's wrong but i can''t think of the killer argument so i joined this forum to see if u clever folks could sort this out for me. i just need an example where the speed of the fuel being propelled to create acceleration is slower than the maximum speed the vehicle can reach. thanks.