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!

Rotational doubt (also momentum)

  1. Dec 11, 2008 #1
    If a ball collides elastically with a stick at a point other than its centre of mass, then can we use coefficient of restitution is one or do we have to use initial kinetic energy = final kinetic energy??

    If we can't use "coefficient of restitution is one" then why???
  2. jcsd
  3. Dec 11, 2008 #2


    User Avatar

    Staff: Mentor

    According to the definition of an elastic collision, the total kinetic energy is conserved.
  4. Dec 11, 2008 #3
    so u r telling that we cant use coefficient of restitution as zero in this case??
  5. Dec 11, 2008 #4


    User Avatar
    Science Advisor

    You must mean one instead of zero.
    The COF will not be one if either object starts to rotate.
  6. Dec 12, 2008 #5
    Yeah i meant 1
    then what will be COR??
  7. Dec 12, 2008 #6

    Doc Al

    User Avatar

    Staff: Mentor

    Why not forget about COR and just apply conservation of linear momentum, angular momentum, and kinetic energy.
Share this great discussion with others via Reddit, Google+, Twitter, or Facebook