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The conservation of momentum applies in particle interactions by ensuring that the total momentum before and after the interaction remains constant.

In particle interactions, particles collide and interact with each other, resulting in changes in their momentum. However, the total momentum of the system before and after the interaction must remain constant, according to the law of conservation of momentum. This means that the sum of the momenta of all particles involved in the interaction before the interaction must be equal to the sum of their momenta after the interaction.

The conservation of momentum can be used to predict the outcomes of particle interactions. For example, in elastic collisions, where the kinetic energy of the particles is conserved, the conservation of momentum can be used to calculate the velocities of the particles after the collision. In inelastic collisions, where some of the kinetic energy is lost, the conservation of momentum can be used to calculate the final velocities of the particles and the amount of energy lost.

The conservation of momentum also applies in particle interactions involving forces, such as electromagnetic and gravitational forces. In these interactions, the momentum of the particles can change due to the forces acting on them, but the total momentum of the system remains constant.

Overall, the conservation of momentum is a fundamental principle in particle interactions that allows us to predict and understand the behaviour of particles in collisions and other interactions.

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