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!

If a particle and a system have zero momentum

  1. Feb 25, 2008 #1


    User Avatar

    Is it true that they both must also have zero kinetic energy?
  2. jcsd
  3. Feb 25, 2008 #2
    If we are talking of one particle, and it has zero momentum, it must have zero velocity (mass cannot be zero), and so its kinetic energy is zero.
    If a system of particles has zero momentum, any one particle in the system may still have momentum, say ,if it is vibrating in a lattice, but the system as a whole does not.
Know someone interested in this topic? Share this thread via Reddit, Google+, Twitter, or Facebook

Have something to add?

Similar Discussions: If a particle and a system have zero momentum