Two Spacemen Are Floating Together with Zero Speed in a Gravity-Free

question 2

Multiple Choice

Two spacemen are floating together with zero speed in a gravity-free region of space.The mass of spaceman A is 120 kg and that of spaceman B is 90 kg.Spaceman A pushes B away from him with B attaining a final speed of 0.5 m/s.The final recoil speed of A is:

• A)0 m/s
• B)0.38 m/s
• C)0.43 m/s
• D)0.50 m/s
• E)1.0 m/s

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