The space shuttle Copernicus is docking with an orbiting space station for refueling. Copernicus has a mass of 20,000 kg and approaches the station with a speed of 50 m/s . The space station has a mass of 80,000 kg and is floating toward the space ship with a speed of 10 m/s . How fast will Copernicus and the space station be moving after they have successfully docked? *Hint* remember that the direction of speed matters.
