Recent content by PCB

Thanks vanhees71 but you have missed my point in that I am trying to fin why my derivation is wrong. And thanks Nugatory. I know there is a difference between classical and relativistic P and kE etc... What I am trying to do is relativise the classic formula which is why I am using gamma. You...

Yes I know. Your equation is equivalent to my equation 2. The p in my equation 1 is relativistic momentum, thus (I think) equation 1 should equal equation 2.

robphy, Yes, it integrates into equation 2.

robphy, I post above was made just as you added to your latest post. Yes, p is relativistic momentum, as can be seen in the equation 1. Thus my problem--I cannot figure out why my equation 1 doesn't equal equation 2.

jtbell, First of all, thank you for your response(s). I think E=pv might work because I am using relativistic p, meaning m/gamma*v. (Sorry, I haven't figured out LaTex yet). Concerning the extraneous 2, I am assuming that the kE imparted on an object is 1/2E when the reference frame is...

Thanks robphy. I am aware of several different derivations of relativistic kE, but I am trying to find out why my derivation does not work

Nugatory, The units I am using are kg, meters, seconds. Specifically, v = 750,000 m/s and 299,790,000 m/s for c. I will look into writing in Latex. I write in "Excel" presently. Because I do not trust my algebra, I calculate with real numbers so I can check the calculations. jtbell, I didn't...

Hello, I tried a different route to derive relativistic kinetic energy and I cannot see why it doesn't work. Here is my work: 8.00000000000000E+01 RM, Rest mass of object 7.50000000000000E+05 v, velocity of object 6.00001877636573E+07 Momentum, p,= RM/Sqrt(1-(v^2/c^2))*v...

Thanks very much, your efforts are much appreciated. I cannot help but feel that a term used as much as it is in many formal papers is not well defined, and/or that definition is not easy to find--in this information age.

Thanks, that is helpful, but I was looking for a detailed definition so I could understand what, for instance, 2.5 scale lengths meant in a particular situation.

thanks, I have googled the term and I have found numerous uses of the term, but no definition. If you can help I would very much appreciate it.

Can anyone please give m the definition of disc scalelength?

Dear Nuqatory, I didn't come to the conclusion that the two springs weighted the same, indeed, I was expecting Khashishi's answer. I re-asked the question because it seemed to me that your first reply implied they did weight the same. I obviously mis-understood your reply and I apologise for...

So in my original scenario, the uncompressed spring weights the same as the compressed spring?

Thank you, but the question was what is the extra mass called. are you saying the "extra" mass has no other name than potential energy?