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Crossfire was a popular board game in which players attempted to propel a "puck" forward towards their opponet's side by shooting metal balls at it. Suppose the puck has a mass of 80 g and starts at rest, and each metal ball has a mass of 5 g and can be shot with a velocity of 2.25 m/s. What is the maximum speed a player can impart to the puck with a single shot, assuming the collision is elastic? (m/s)

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