Quote:
Originally Posted by Besoeker
Corect. WORK cannot be done in zero time. But you CAN derive a value for power.
As δt → 0 you get dw/dt for rate of work. The equations deal with the concept of zero time very nicely, (thanks Mr Newton.  )
QED. Power does not imply or require the passage of time.
Power is an instantaneous value. No ifs, no buts.
If you can't understand that, just accept it. |
Power is a derivation of time and work and to exist ( have a value > 0 ) requires time. Your argument though, was that energy cannot be instantaneous. I claimed and demonstrated that it can. No ifs, no buts. If you can't understand that, just accept it.
More importantly though, none of this changes the fact that the articles intended meanings are clear.
Also; you claim energy can't be instantaneous when time = 0 because value is zero when t = 0
i.e. with; E = P x t; so if t = 0 E = 0
But also one can say a similar thing about power;
P=w/t; thus; P x t = w; thus if t = 0 then P x 0 = 0 thus P= 0 w= 0 t = 0
Thus when t = 0 w = p = 0 Thus with your logic appears inconsistent.
Instantaneous is in the observation of the moment the frame of reference, be you observing power or energy or anything else. Power is just a rate of work over time and further more average rate of power can be applied over time.
The articles are clearly understandable and correct.