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2-Dimensional Momentum Problem

  1. Mar 13, 2012 #1
    1. The problem statement, all variables and given/known data

    A mass "m1" moves along the x axis with velocity of magnitude v0 on a frictionless table. It strikes another mass m2 which is initially at rest. The mass m1 goes off along the y-axis. If half the original kinetic energy is lost in the collision, with what speed and at what angle does m2 leave the point of collision?

    2. Relevant equations

    1/2KE(initial) = KE(final)
    (1/2)Pix=Pfx
    (1/2)Piy=Pfy

    3. The attempt at a solution

    Pix=vom1
    Pfx=u2m2cosθ
    Piy=0
    Pfy=u1m1 - u2m2sinθ

    I think these are the initial and final components of momentum, but I don't know how to find θ and u2 in terms of known variables.
     
  2. jcsd
  3. Mar 13, 2012 #2

    tiny-tim

    User Avatar
    Science Advisor
    Homework Helper

    hi texan14! :smile:
    you seem to be confusing KE and momentum :confused:

    what is your KE equation?​
     
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