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QUESTION
Suppose a 10 kg bowling ball elastically collides with a 5 kg bowling ball that is sitting at rest.
Suppose a 10 kg bowling ball elastically collides with a 5 kg bowling ball that is sitting at rest. The 5 kg ball is observed to move at 4 m/s after the collision, traveling along the same direction as the 10 kg ball. How fast is the 10 kg ball moving after the collision?
