A 40,000kg object moving to the right at 3.1m/s collides with a car of mass 55,000kg moving to the left at 520cm/s. The two cars couples together. What is their speed after the collision? (A) 1.7m/s to the left (B) 3.8m/s to the left (C) 1.7m/s to the right (D)5.9m/s to the right (F)3.8m/s to the righ

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