Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

Chain rule

  1. Feb 10, 2014 #1
    Hi fi you look at quesiotn 16b in the following link they try to find dE/dx.

    they use the chain rule. the chain rule says dF/dt=dx/dt*dF/dx+dy/dt*dF/dy if F=f(x,y) and x=f(t) and y=f(t).

    But in 16b they're trying to find dE/dx and as part of the use of the chain rule they try to find dt'/dx (in the first equation under where it says 'a galilean transform...') however t' is not a function of x, so i don't understand why they're taking the derivative of t' wrt to x.


    http://stuff.mit.edu/afs/athena/course/8/8.20/www/sols/sol1.pdf
     
  2. jcsd
  3. Feb 10, 2014 #2

    vanhees71

    User Avatar
    Science Advisor
    2016 Award

    That's very simple,
    [tex]\frac{\partial t'}{\partial x}=0.[/tex]
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook




Similar Discussions: Chain rule
  1. Chain rule proof (Replies: 11)

  2. The chain rule (PDE) (Replies: 1)

Loading...