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OpenStudy (anonymous):
A 60 lb girl and a 50 lb boy face each other on frictionless rollerskates. The girl pushes the boy, who moves away at a speed of 4.0 ft/s. The girl's speed is?
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OpenStudy (anonymous):
M1 * V1 = M2* V2 60lb(v)=50lb(-4.0ft/s).....- velocity man in opposite direction v is the velocity of the girl =(10/3)ft/s
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