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OpenStudy (anonymous):
Ball 1, with a mass of 10kg, is moving to the right at 20m/s. Ball 2 is moving to the left at 20m/s. Upon collision, Ball 2 comes to a standstill, and Ball 1 moves to the left at twice its original speed. What is the mass of Ball 2?
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OpenStudy (goformit100):
use force law
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