To determine what happens to the momentum of the pink ball after a collision, we need to consider the type of collision that occurs (elastic or inelastic) and the interaction with other objects.
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In an elastic collision, both momentum and kinetic energy are conserved. In this case, the momentum of the pink ball may change depending on the mass and velocity of the other object involved in the collision, but the total momentum of the system remains constant.
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In an inelastic collision, momentum is conserved, but kinetic energy is not. The pink ball's momentum will change depending on its interaction with the other object, but again, the total momentum before and after the collision remains constant.
Without further context, such as whether the collision is elastic or inelastic, or information about the mass and velocity of the other object, it's difficult to provide a definitive answer. However, generally speaking after a collision, the momentum of a single object (like the pink ball) can either increase, decrease, or stay the same, depending on these factors.
If you know the type of collision or the specific circumstances, you could choose the most appropriate response based on that information.