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OpenStudy (anonymous):
what does it mean to say that momentum is conserved?
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OpenStudy (anonymous):
Qualitatively: neglecting friction and conversion of energy into other forms, momentum has the same magnitude at all times. In the case of collisions, momentum is the same before and after. Quantitatively: \[p_{1} = p_{2}\]\[m_{1}\delta v_{1}=m_{2}\delta v_{2}\]
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