Spaceship 1 and spaceship 2 have equal masses of 300 kg. spaceship 1 has a speed of 0 m/s, and spaceship 2 has a speed of 4 m/s. what is the magnitude of their combined momentum? A. 600 kg-m/s B. 1,200 kg-m/s C. 2,400 kg-m/s D. 2,000 kg-m/s
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