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OpenStudy (anonymous):
A magnetic hockey puck (0.40 kg) hits another hockey puck (0.40 kg) at rest and both travel together to the right at 8.0 m/s. How fast was the first hockey puck initially moving?
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OpenStudy (anonymous):
Apply Law of conservation of momentum here
OpenStudy (anonymous):
So it would be (.4*.4)8.0 and then solve ?
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