A 8000 kg truck travelling at 4 m/s east collides with 2000 kg car moving at 16 m/s in direction 300 south of west. After collision, the two vehicles remains tangled together.   i)  Find the momentum of lorry and the car before the collision. ii)  With what speed and in what direction does the wreckage begin to move? iii) Is this an elastic collision? Verify your answer.

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