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

Easy momentum/ kenitic

  1. Mar 23, 2009 #1
    I know that :

    kinetic energy of something = P^2 / 2m , or momentum squared over 2m

    why so?

    I see that taking the integral of mv dv = kenitic.

    can you prove this to
  2. jcsd
  3. Mar 23, 2009 #2

    Vanadium 50

    User Avatar
    Staff Emeritus
    Science Advisor
    Education Advisor

    You know p in terms of m and v. You also know E in terms of m and v. This should get you started.
  4. Mar 23, 2009 #3
    KE = [tex]\frac{1}{2} mv ^ 2[/tex]

    = [tex]\frac{1}{2} pv[/tex]

    = [tex]\frac{1}{2} \frac{pmv}{m}[/tex]

    = [tex]\frac{1}{2} \frac{p ^ 2}{m}[/tex]
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Similar Discussions: Easy momentum/ kenitic
  1. Easy question (Replies: 3)

  2. An Easy Question (Replies: 7)

  3. Easy question (Replies: 1)