A boy and girl on ice skates face each other.The girl has a mass of 20 kg and the boy has a mass of 30 kg.The boy pushes the girl backward at a speed of 3.0 m/s.As a result of the push,the speed of the boy is
A)zero
B)2.0 m/s
C)3.0 m/s
D)4.5 m/s
E)9.0 m/s

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The Answer of A boy and girl on ice skates face each other.The girl has a mass of 20 kg and the boy has a mass of 30 kg.The boy pushes the girl backward at a speed of 3.0 m/s.As a result of the push,the speed of the boy is
A)zero
B)2.0 m/s
C)3.0 m/s
D)4.5 m/s
E)9.0 m/s

A Boy and Girl on Ice Skates Face Each Other