A space vehicle approaches a space station in orbit. The intent of the engineers is to have the vehicle slowly approach, reducing velocity, until a docking maneuver is completed and the vehicle is attached to the station.How does the total momentum of the docked vehicle and station compare to the momentum of each object before the docking maneuver?

During docking, the vehicle and station exert forces on each other, but these are internal forces within the combined system. If external forces are negligible, the system’s total momentum is conserved. Therefore, after docking, the combined momentum is the same as the vector sum of the vehicle’s and station’s momenta before docking; it is not necessarily equal to either object’s individual momentum.

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