Bumper cars A and B undergo a collision during which the momentum of the combined system is conserved.
Which equation(s) correctly states the principle of conservation of momentum?
1. Pโ A, i+Pโ B, i=Pโ A, f+Pโ B, f
2. Pโ A, i+Pโ A, f=Pโ B, i+Pโ B, f
3. ฮPโ A=ฮPโ B
4. ฮPโ A+ฮPโ B=0
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