Momentum in an Explosion

  • #1

Homework Statement


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.
1013816.jpg

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?

Homework Equations


law of conservation of momentum

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 ?
 

Answers and Replies

  • #2
51
0
That's right! just set it up lie that and remmber since they go in opposite directions, one is negative so

0 = m1v1-m2v2
 
  • #3
THANKS aimslin 22 for givin positive resp
 

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