Momentum in an Explosion

  1. 1. The problem statement, all variables and given/known data
    A giant "egg" explodes as part of a fireworks display. The egg is at rest before the explosion, and after the explosion, it breaks into two pieces, with the masses indicated in the diagram, traveling in opposite directions.
    [​IMG]
    Part A
    What is the momentum PA,i of piece A before the explosion?(initial momentum)
    Part B
    During the explosion, is the force of piece A on piece B greater than, less than, or equal to the force of piece B on piece A?

    2. Relevant equations
    law of conservation of momentum

    3. The attempt at a solution
    part a
    i think as it says in the question that the egg is at rest so wont the initial momentum be zero but a bit hesitant ...cant be that easy....
    part b
    equal forces according to newtons law ?
     
  2. jcsd
  3. That's right! just set it up lie that and remmber since they go in opposite directions, one is negative so

    0 = m1v1-m2v2
     
  4. THANKS aimslin 22 for givin positive resp
     
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