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Physics 18 Online
OpenStudy (anonymous):

Explain what you understand by the phrase 'momentum is conserved'.

OpenStudy (naveenbabbar):

In a system of particles which are free to move and no net external force is acting on it then the initial momentum of the system is equal to the final momentum.

OpenStudy (tammy18):

The momentum before collision is equal to the momentum after the collision.

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