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A 1800 kg car traveling north (+) at 70 km/h collides at an intersection with a 2000 kg car traveling west (-) at 57 km/h. The two cars stick together. (a) What is the total momentum of the system before the collision? P= ?? kg · km/h (b) Find the magnitude and direction of the velocity of the wreckage just after the collision. vf = ?? km/h (c) ? = ?? ° (west of north)

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