1. PF Contest - Win "Conquering the Physics GRE" book! Click Here to Enter
    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!

Conservation of momentum

  1. Nov 21, 2009 #1
    Is momentum always conserved when total mechanical energy is conserved?

    My understanding is that this is false, but unsure.
  2. jcsd
  3. Nov 21, 2009 #2


    User Avatar
    Science Advisor
    Homework Helper
    Gold Member

    Consider a ball falling from rest. Neglecting air resistance, its momentum continuously increases (not conserved), but its mechanical energy remains unchanged.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook