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Homework Help: 2-D Collisions

  1. Feb 7, 2008 #1
    1. The problem statement, all variables and given/known data

    A 3000kg space capsule is traveling with a velocity of 200m/s. In an effort to alter its course, it fires a 25.0 kg projecticle perpendicular to its original direction of motion at a speed of 2000 m/s. What is the speed of the capsule and by what angle has its direction changed.

    * my teacher said assume mass stays the same*

    2. Relevant equations

    P = mv
    m1v1 + m2v2 = m1v1' + m2v2'
    M = m1 + m2
    V = combined velocity

    3. The attempt at a solution

    MV = m1v1' + m2v2'
    (3000)(200) = (3000)(v1') + (25)(2000)
    v1' = 1833.3

    Is this right so far? I'm very confused and am not sure if I should be using Pythagoras to find it or what?
  2. jcsd
  3. Feb 7, 2008 #2
    Can anyone please help me out? I've been stuck on this question for over half an hour. :(
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