Spaceship 1 and Spaceship 2 have equal masses of 200 kg. They collide.
Spaceship 1's final speed is 2 m/s, and Spaceship 2's final speed is 1 m/s in
the same direction. What is their combined momentum?
O
A. 200 kg-m/s
O
O
O
B. 400 kg-m/s
C. 800 kg-m/s
D. 600 kg-m/s