Rebecca of Mass 50 Kg and Robert of Mass 60

question 62

Multiple Choice

Rebecca of mass 50 kg and Robert of mass 60 kg are initially at rest on a frictionless frozen lake.Robert throws a book of mass 0.50 kg at Rebecca with 20 m/s relative to the ice.Rebecca catches the book.Assuming the book is traveling horizontally,their final speeds are

• A)V_Reb = 12.0 m/s,V_Rob = 17.0 m/s.
• B)V_Reb = 1.51 m/s,V_Rob = 4.17 m/s.
• C)V_Reb = 0.20 m/s,V_Rob = 0.17 m/s.
• D)V_Reb = 0.12 m/s,V_Rob = 6.17 m/s.

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