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Homework Help: Momentum Explosion Question

  1. Jan 12, 2016 #1
    1. The problem statement, all variables and given/known data
    A 50kg object explodes into three pieces. Piece 1 flies off at 12m/s [N 30o E], piece 2 has velocity 10m/s [ S ]. If the mass of piece 1 is 25kg and piece 2 is 12kg, find the mass and velocity of piece 3.

    2. Relevant equations

    3. The attempt at a solution
    My attempt is shown below. Can anyone confirm my work? Not sure if my vector diagram is drawn correctly. Thanks! All help is very much appreciated!

    Attached Files:

  2. jcsd
  3. Jan 12, 2016 #2
    I dont think that is correct.
    you should divide momentum into components (x and y)

    furthermore, what is V3= xxx Kg*m/s ... are kg*m/s a velocity dimension?
  4. Jan 12, 2016 #3


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    Staff: Mentor

    The working looks good, solving from the vector diagram. The correct vector was identified that makes the net momentum zero, and its components determined.
  5. Jan 12, 2016 #4
    The answer should read 15.8 m/s not 15.8 kgm/s. My bad.
  6. Jan 12, 2016 #5
    yeah.. and the answer is correct sorry, my bad.
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