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A TRAIN CAR OF MASS 4753 KG MOVING AT 8.0 M/S COLLIDES WITH TRAIN CAR OF 5000KG WHICH IS MOVING IN THE SAME DIRECTION 3.0 M/S WHAT IS THE VELOCITY
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m₁v₁+m₂v₂=(m₁+m₂)u
u= {m₁v₁+m₂v₂}/(m₁+m₂)
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