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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asked Apr 10, 2018 16.9k views

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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?

Physics
college

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by Serializer

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Momentum is conserved and P=mv
Therefore
(0.4+0.4)x8 = 6.4
6.4/0.4=16ms^-1

Mario Haubenwallner answered Apr 16, 2018

by Mario Haubenwallner

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