Recent content by Skwint

I don't mind the answers becoming philosophical. I remember one of my professors laughing when I said energy was just book keeping and telling me it existed and has mass. It is interesting to see it circle round to where I started when I try to resolve that...

Sure. It doesn't really answer the original question though? Does energy actually "exist"? The total energy in a system depends on who is looking at it - is it no more than a mathematically construct, or is it as tangible as, say, a particle?

I wasn't sure whether this question belonged in relativity or QM, or even just plain classic. This forum seemed the best bet, but I am not using speeds near C - mere Galilean relativity will suffice here. I have two objects, A and B A is moving with velocity V and thus has kinetic energy E...