A 30-kg girl and a 25-kg boy face each other on
A 30-kg girl and a 25-kg boy face each other on friction-freeroller skates. The girl pushes the boy, who moves away at aspeed of 2.0 m/s. What is the girl's speed?
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a 30-kg girl and a 25-kg boy face each other on friction-freeroller skates the girl pushes the boy who moves away at
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