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Momentum is conserved in a collision, meaning the total momentum before and after the collision is the same.

In a collision, two or more objects interact with each other and exchange momentum. According to the law of conservation of momentum, the total momentum of the system remains constant before and after the collision. This means that the sum of the momenta of all the objects involved in the collision is the same before and after the collision.

Mathematically, we can express the conservation of momentum as follows:

Total momentum before collision = Total momentum after collision

or

m1v1i + m2v2i + ... = m1v1f + m2v2f + ...

where m1, m2, ... are the masses of the objects involved in the collision, v1i, v2i, ... are their initial velocities, and v1f, v2f, ... are their final velocities.

This equation can be used to solve for the final velocities of the objects involved in the collision, given their initial velocities and masses. It is important to note that momentum is a vector quantity, meaning it has both magnitude and direction. Therefore, the conservation of momentum applies separately to each component of the momentum vector.

Overall, the conservation of momentum is a fundamental principle in physics that plays a crucial role in understanding the dynamics of collisions and other interactions between objects.

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