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

Homework Help: How momentum is related to energy

  1. Jan 4, 2005 #1
    What is the relationship between momentum/Impulse and energy?

    Momentum=p=m*v
    Impulse=I=F*t
    KE=.5mv^2

    so...
    KE=.5m(p/m)^2
    KE=.5*p*(p/m)
    KE=p^2/2m
    correct?
     
  2. jcsd
  3. Jan 4, 2005 #2

    learningphysics

    User Avatar
    Homework Helper

    Yup. Looks good to me.
     
  4. Jan 4, 2005 #3
    In this case you elimanate the varible v, although you could ralate momentum and energy this way, but the elimanation of the varible v causes lurking varibles. So its best to only relate energy and momentum when you have an elastic collusion, or Kinetic Energy is conserved
     
  5. Jan 4, 2005 #4
    is there any other relationships between energy and momentum?
     
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook