1. Limited time only! Sign up for a free 30min personal 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!

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)

Loading...