- #1
RazzTazz
- 9
- 0
- TL;DR Summary
- Violation of the first law of thermodynamics.
If you have 3 observers, one at rest 0c, one at 0.8c, and one that moves between these 2 frames of reference. The observer that moves between the frames starts at 0c and accelerates all the way up to 0.8c. As it accelerates, the observer in the stationary frame sees its momentum, relativistic mass, KE, time dilation, and length contraction increase. He converts his fuel into KE so he can reach 0.8c. The rocket is in balance since we know by Newton's 3rd law how the rocket gets its KE. The problem arises when you turn from 0.8c back to 0c as you still need to spend energy to decelerate back to 0c. Yesterday people told me that the energy is the fumes and KE that accelerated the rocket, but that is not it because KE is not a physical thing. You accelerate and decelerate back to the original position, but the KE from acceleration was canceled at deceleration so all that is left behind when you reach 0c is just fumes from the rocket, a lot of energy lost, and no work done. You lose your KE energy and that energy didn't dissipate in any sort of radiation or it hasn't done any work. Is like you never left the 0c position if you count just the KE, but you do leave a trail of smoke, head on behind your rocket journey, so for sure you made the trip. SO WHERE IS THE KE? I think I know what's going on with the missing KE, but I want to hear you first. Do you have any answer to this?