Question 13

Particle A of mass 2.0 kg is moving at a speed of 21 m/s toward particle B of mass 5.0 kg. Particle B is stationary. What are the velocities of A and B relative to the center-of-mass of the two particles?

• A.    21 m/s, 0 m/s
• B.    10.5 m/s, -10.5 m/s
• C.    15 m/s, -6.0 m/s
• D.    27 m/s, 6.0 m/s
• E.    5.0 m/s, -15 m/s
• F.    None of the above

Formula Sheet

Question 12

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