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Y-components of momentum

  1. Mar 10, 2007 #1
    Why is it that in many momentum questions, the mass gets cancelled out when calculating y-components of momentum? All it says in my textbook is that they cancell out since the colliding objects are going in opposite directions, but this doesn't make any sense to me. Can someone please help?
     
  2. jcsd
  3. Mar 10, 2007 #2
    Can you type exactly what your book says. I think you might be misreading it.
     
  4. Mar 10, 2007 #3
    nm, i misread something, i figured it out though so don't worry
     
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