Two meteors a and b collide in outer space a has mass 4000, Ask an Expert

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Two meteors A and B collide in outer space. A has mass 4000 kg and B has mass 8000 Kg. A has initial velocity (500, -500,300 ) m/s while B has velocity (-200,400, -100) m/s. After the collision. A has velocity (-300,200,100) m/s. Find the velocity vector of meteor B in m/s.

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