At the instant a 2.0-kg particle has a velocity of 4.0 m/s in the positive x direction, a 3.0-kg particle has a velocity of 5.0 m/s in the positive y direction. What is the speed of the center of mass of the two-particle system?
A. 3.8 m/s
B. 3.4 m/s
C. 5.0 m/s
D. 4.4 m/s
E. 4.6 m/s
Answer: B
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