A 50.0 kg child is riding in a 120.0 kg bumper car at an amusement park. The child drives the bumper car at 4.5 m/s head-on into the wall of the ride and rebounds at 1/3 the speed. What is the magnitude of the change in momentum of the child in the bumper car?
A. 375 kg•m/s
B. 510 kg•m/s
C. 720 kg•m/s
D. 1020 kg•m/s
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