In collisions involving rolling objects, both linear and angular momentum must be considered to accurately describe the system. The conservation of momentum equation, m1u1 + m2u2 = m1v1 + m2v2, can be expanded to include angular momentum by incorporating the moment of inertia and angular velocity. This integration allows for a comprehensive analysis of scenarios where an object rolls, such as a ball influenced by water flow. It is essential to combine linear and angular momentum equations rather than treating them independently for a complete understanding of the dynamics involved. Overall, the conservation principles apply to both types of momentum in these complex interactions.