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A 2.0-N puck is traveling at 3.0 m/s. It strikes an 4.0-N puck, which is moving...

A 2.0-N puck is traveling at 3.0 m/s. It strikes an 4.0-N puck, which is moving at – 2.0 m/s before collision. The two pucks stick together. Find their common final speed

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