Angelabm Angelabm

28-02-2017
Physics

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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?

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ozzwozz ozzwozz

28-02-2017

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

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