1. Not finding help here? Sign up for a free 30min tutor trial with Chegg Tutors
    Dismiss Notice
Dismiss Notice
Join Physics Forums Today!
The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

I know the answer but I don't know why!

  1. Jun 19, 2005 #1
    I have a question that asks me to write dv/dt as a function of x.

    I know that dv/dt = vdv/dx

    but I don't know why this is. Could anybody shed some light on this for me? Just so I understand why it is this!!!

    Thanks in advance
     
  2. jcsd
  3. Jun 19, 2005 #2

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    Did you hear about the chain rule of differentiation...?

    Daniel.
     
  4. Jun 19, 2005 #3
    yeah that though occured to me whilst sitting in the car just.

    but surely theres another term involved in it isn't there?
     
  5. Jun 19, 2005 #4

    dextercioby

    User Avatar
    Science Advisor
    Homework Helper

    No.

    [tex] \frac{dv}{dt}=\frac{dv}{dx}\frac{dx}{dt} [/tex].

    Daniel.
     
  6. Jun 19, 2005 #5
    Of course!! What I had in mind was the product rule! Thank you for that - makes so much sense to me now!!!
     
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?