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Q1. The total momentum of a closed system is observed to be 670 kg·m/s east. The system consists of 36 objects that are observed to be colliding with each other. After 13.3 min and 4732 collisions, what is the total momentum of system?

Q2. How long would it take you to cover the 83 length of the walkway if, once you get on the walkway, you at once turns around and start walking in the opposite direction with a speed of 1.7 relative to the walkway?

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