A 3.0-kg object travelling 6.0m/s East has a perfectly elastic collision with a 4.0kg object travelling at 8.0 West. After the collision, the 3.0kg object will travel 10.0 m/s West. a. What was the total momentum before the collision? b. What is the total momentum of these objects after the collision? c. What velocity will the 4.0-kg object have after the collision?

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