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A 0.105-kg hockey puck moving at 26 m/s is caught and held by a 72-kg goalie at rest. With what speed does the goalie slide on the ice?

  • physics - ,

    Mpuck*Vpuck = (Mpuck+Mgoalie)*Vfinal

    Vfinal = (0.105/72.1)*26 m/s

    It's called momentum conservation

    It assumes that goalie is not in contact with the goal

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